初级微积分示例

$f (x) = 7 (x^{\frac{1}{5}} + 7)$ ; find $f^{- 1} (x)$

解题步骤 1

将 $f (x) = 7 (x^{\frac{1}{5}} + 7)$ 写为等式。

$y = 7 (x^{\frac{1}{5}} + 7)$

解题步骤 2

交换变量。

$x = 7 (y^{\frac{1}{5}} + 7)$

解题步骤 3

求解 $y$ 。

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解题步骤 3.1

将方程重写为 $7 (y^{\frac{1}{5}} + 7) = x$ 。

$7 (y^{\frac{1}{5}} + 7) = x$

解题步骤 3.2

将 $7 (y^{\frac{1}{5}} + 7) = x$ 中的每一项除以 $7$ 并化简。

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解题步骤 3.2.1

将 $7 (y^{\frac{1}{5}} + 7) = x$ 中的每一项都除以 $7$ 。

$\frac{7 (y^{\frac{1}{5}} + 7)}{7} = \frac{x}{7}$

解题步骤 3.2.2

化简左边。

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解题步骤 3.2.2.1

约去公因数。

$\frac{7 (y^{\frac{1}{5}} + 7)}{7} = \frac{x}{7}$

解题步骤 3.2.2.2

用 $y^{\frac{1}{5}} + 7$ 除以 $1$ 。

$y^{\frac{1}{5}} + 7 = \frac{x}{7}$

解题步骤 3.3

将所有不包含 $y$ 的项移到等式右边。

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解题步骤 3.3.1

从等式两边同时减去 $7$ 。

$y^{\frac{1}{5}} - \frac{x}{7} = - 7$

解题步骤 3.3.2

在等式两边都加上 $\frac{x}{7}$ 。

$y^{\frac{1}{5}} = - 7 + \frac{x}{7}$

解题步骤 3.4

将方程两边同时进行 $5$ 次方运算以消去左边的分数指数。

${(y^{\frac{1}{5}})}^{5} = {(- 7 + \frac{x}{7})}^{5}$

解题步骤 3.5

化简指数。

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解题步骤 3.5.1

化简左边。

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解题步骤 3.5.1.1

化简 ${(y^{\frac{1}{5}})}^{5}$ 。

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解题步骤 3.5.1.1.1

将 ${(y^{\frac{1}{5}})}^{5}$ 中的指数相乘。

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解题步骤 3.5.1.1.1.1

运用幂法则并将指数相乘， ${(a^{m})}^{n} = a^{m n}$ 。

$y^{\frac{1}{5} \cdot 5} = {(- 7 + \frac{x}{7})}^{5}$

解题步骤 3.5.1.1.1.2

约去 $5$ 的公因数。

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解题步骤 3.5.1.1.1.2.1

约去公因数。

$y^{\frac{1}{5} \cdot 5} = {(- 7 + \frac{x}{7})}^{5}$

解题步骤 3.5.1.1.1.2.2

重写表达式。

$y^{1} = {(- 7 + \frac{x}{7})}^{5}$

解题步骤 3.5.1.1.2

化简。

$y = {(- 7 + \frac{x}{7})}^{5}$

解题步骤 3.5.2

化简右边。

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解题步骤 3.5.2.1

化简 ${(- 7 + \frac{x}{7})}^{5}$ 。

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解题步骤 3.5.2.1.1

使用二项式定理。

$y = {(- 7)}^{5} + 5 {(- 7)}^{4} \frac{x}{7} + 10 {(- 7)}^{3} {(\frac{x}{7})}^{2} + 10 {(- 7)}^{2} {(\frac{x}{7})}^{3} + 5 \cdot - 7 {(\frac{x}{7})}^{4} + {(\frac{x}{7})}^{5}$

解题步骤 3.5.2.1.2

化简每一项。

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解题步骤 3.5.2.1.2.1

对 $- 7$ 进行 $5$ 次方运算。

$y = - 16807 + 5 {(- 7)}^{4} \frac{x}{7} + 10 {(- 7)}^{3} {(\frac{x}{7})}^{2} + 10 {(- 7)}^{2} {(\frac{x}{7})}^{3} + 5 \cdot - 7 {(\frac{x}{7})}^{4} + {(\frac{x}{7})}^{5}$

解题步骤 3.5.2.1.2.2

对 $- 7$ 进行 $4$ 次方运算。

$y = - 16807 + 5 \cdot 2401 \frac{x}{7} + 10 {(- 7)}^{3} {(\frac{x}{7})}^{2} + 10 {(- 7)}^{2} {(\frac{x}{7})}^{3} + 5 \cdot - 7 {(\frac{x}{7})}^{4} + {(\frac{x}{7})}^{5}$

解题步骤 3.5.2.1.2.3

将 $5$ 乘以 $2401$ 。

$y = - 16807 + 12005 \frac{x}{7} + 10 {(- 7)}^{3} {(\frac{x}{7})}^{2} + 10 {(- 7)}^{2} {(\frac{x}{7})}^{3} + 5 \cdot - 7 {(\frac{x}{7})}^{4} + {(\frac{x}{7})}^{5}$

解题步骤 3.5.2.1.2.4

约去 $7$ 的公因数。

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解题步骤 3.5.2.1.2.4.1

从 $12005$ 中分解出因数 $7$ 。

$y = - 16807 + 7 (1715) \frac{x}{7} + 10 {(- 7)}^{3} {(\frac{x}{7})}^{2} + 10 {(- 7)}^{2} {(\frac{x}{7})}^{3} + 5 \cdot - 7 {(\frac{x}{7})}^{4} + {(\frac{x}{7})}^{5}$

解题步骤 3.5.2.1.2.4.2

约去公因数。

$y = - 16807 + 7 \cdot 1715 \frac{x}{7} + 10 {(- 7)}^{3} {(\frac{x}{7})}^{2} + 10 {(- 7)}^{2} {(\frac{x}{7})}^{3} + 5 \cdot - 7 {(\frac{x}{7})}^{4} + {(\frac{x}{7})}^{5}$

解题步骤 3.5.2.1.2.4.3

重写表达式。

$y = - 16807 + 1715 x + 10 {(- 7)}^{3} {(\frac{x}{7})}^{2} + 10 {(- 7)}^{2} {(\frac{x}{7})}^{3} + 5 \cdot - 7 {(\frac{x}{7})}^{4} + {(\frac{x}{7})}^{5}$

解题步骤 3.5.2.1.2.5

对 $- 7$ 进行 $3$ 次方运算。

$y = - 16807 + 1715 x + 10 \cdot - 343 {(\frac{x}{7})}^{2} + 10 {(- 7)}^{2} {(\frac{x}{7})}^{3} + 5 \cdot - 7 {(\frac{x}{7})}^{4} + {(\frac{x}{7})}^{5}$

解题步骤 3.5.2.1.2.6

将 $10$ 乘以 $- 343$ 。

$y = - 16807 + 1715 x - 3430 {(\frac{x}{7})}^{2} + 10 {(- 7)}^{2} {(\frac{x}{7})}^{3} + 5 \cdot - 7 {(\frac{x}{7})}^{4} + {(\frac{x}{7})}^{5}$

解题步骤 3.5.2.1.2.7

对 $\frac{x}{7}$ 运用乘积法则。

$y = - 16807 + 1715 x - 3430 \frac{x^{2}}{7^{2}} + 10 {(- 7)}^{2} {(\frac{x}{7})}^{3} + 5 \cdot - 7 {(\frac{x}{7})}^{4} + {(\frac{x}{7})}^{5}$

解题步骤 3.5.2.1.2.8

对 $7$ 进行 $2$ 次方运算。

$y = - 16807 + 1715 x - 3430 \frac{x^{2}}{49} + 10 {(- 7)}^{2} {(\frac{x}{7})}^{3} + 5 \cdot - 7 {(\frac{x}{7})}^{4} + {(\frac{x}{7})}^{5}$

解题步骤 3.5.2.1.2.9

约去 $49$ 的公因数。

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解题步骤 3.5.2.1.2.9.1

从 $- 3430$ 中分解出因数 $49$ 。

$y = - 16807 + 1715 x + 49 (- 70) \frac{x^{2}}{49} + 10 {(- 7)}^{2} {(\frac{x}{7})}^{3} + 5 \cdot - 7 {(\frac{x}{7})}^{4} + {(\frac{x}{7})}^{5}$

解题步骤 3.5.2.1.2.9.2

约去公因数。

$y = - 16807 + 1715 x + 49 \cdot - 70 \frac{x^{2}}{49} + 10 {(- 7)}^{2} {(\frac{x}{7})}^{3} + 5 \cdot - 7 {(\frac{x}{7})}^{4} + {(\frac{x}{7})}^{5}$

解题步骤 3.5.2.1.2.9.3

重写表达式。

$y = - 16807 + 1715 x - 70 x^{2} + 10 {(- 7)}^{2} {(\frac{x}{7})}^{3} + 5 \cdot - 7 {(\frac{x}{7})}^{4} + {(\frac{x}{7})}^{5}$

解题步骤 3.5.2.1.2.10

对 $- 7$ 进行 $2$ 次方运算。

$y = - 16807 + 1715 x - 70 x^{2} + 10 \cdot 49 {(\frac{x}{7})}^{3} + 5 \cdot - 7 {(\frac{x}{7})}^{4} + {(\frac{x}{7})}^{5}$

解题步骤 3.5.2.1.2.11

将 $10$ 乘以 $49$ 。

$y = - 16807 + 1715 x - 70 x^{2} + 490 {(\frac{x}{7})}^{3} + 5 \cdot - 7 {(\frac{x}{7})}^{4} + {(\frac{x}{7})}^{5}$

解题步骤 3.5.2.1.2.12

对 $\frac{x}{7}$ 运用乘积法则。

$y = - 16807 + 1715 x - 70 x^{2} + 490 \frac{x^{3}}{7^{3}} + 5 \cdot - 7 {(\frac{x}{7})}^{4} + {(\frac{x}{7})}^{5}$

解题步骤 3.5.2.1.2.13

对 $7$ 进行 $3$ 次方运算。

$y = - 16807 + 1715 x - 70 x^{2} + 490 \frac{x^{3}}{343} + 5 \cdot - 7 {(\frac{x}{7})}^{4} + {(\frac{x}{7})}^{5}$

解题步骤 3.5.2.1.2.14

约去 $49$ 的公因数。

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解题步骤 3.5.2.1.2.14.1

从 $490$ 中分解出因数 $49$ 。

$y = - 16807 + 1715 x - 70 x^{2} + 49 (10) \frac{x^{3}}{343} + 5 \cdot - 7 {(\frac{x}{7})}^{4} + {(\frac{x}{7})}^{5}$

解题步骤 3.5.2.1.2.14.2

从 $343$ 中分解出因数 $49$ 。

$y = - 16807 + 1715 x - 70 x^{2} + 49 \cdot 10 \frac{x^{3}}{49 \cdot 7} + 5 \cdot - 7 {(\frac{x}{7})}^{4} + {(\frac{x}{7})}^{5}$

解题步骤 3.5.2.1.2.14.3

约去公因数。

$y = - 16807 + 1715 x - 70 x^{2} + 49 \cdot 10 \frac{x^{3}}{49 \cdot 7} + 5 \cdot - 7 {(\frac{x}{7})}^{4} + {(\frac{x}{7})}^{5}$

解题步骤 3.5.2.1.2.14.4

重写表达式。

$y = - 16807 + 1715 x - 70 x^{2} + 10 \frac{x^{3}}{7} + 5 \cdot - 7 {(\frac{x}{7})}^{4} + {(\frac{x}{7})}^{5}$

解题步骤 3.5.2.1.2.15

组合 $10$ 和 $\frac{x^{3}}{7}$ 。

$y = - 16807 + 1715 x - 70 x^{2} + \frac{10 x^{3}}{7} + 5 \cdot - 7 {(\frac{x}{7})}^{4} + {(\frac{x}{7})}^{5}$

解题步骤 3.5.2.1.2.16

将 $5$ 乘以 $- 7$ 。

$y = - 16807 + 1715 x - 70 x^{2} + \frac{10 x^{3}}{7} - 35 {(\frac{x}{7})}^{4} + {(\frac{x}{7})}^{5}$

解题步骤 3.5.2.1.2.17

对 $\frac{x}{7}$ 运用乘积法则。

$y = - 16807 + 1715 x - 70 x^{2} + \frac{10 x^{3}}{7} - 35 \frac{x^{4}}{7^{4}} + {(\frac{x}{7})}^{5}$

解题步骤 3.5.2.1.2.18

对 $7$ 进行 $4$ 次方运算。

$y = - 16807 + 1715 x - 70 x^{2} + \frac{10 x^{3}}{7} - 35 \frac{x^{4}}{2401} + {(\frac{x}{7})}^{5}$

解题步骤 3.5.2.1.2.19

约去 $7$ 的公因数。

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解题步骤 3.5.2.1.2.19.1

从 $- 35$ 中分解出因数 $7$ 。

$y = - 16807 + 1715 x - 70 x^{2} + \frac{10 x^{3}}{7} + 7 (- 5) \frac{x^{4}}{2401} + {(\frac{x}{7})}^{5}$

解题步骤 3.5.2.1.2.19.2

从 $2401$ 中分解出因数 $7$ 。

$y = - 16807 + 1715 x - 70 x^{2} + \frac{10 x^{3}}{7} + 7 \cdot - 5 \frac{x^{4}}{7 \cdot 343} + {(\frac{x}{7})}^{5}$

解题步骤 3.5.2.1.2.19.3

约去公因数。

$y = - 16807 + 1715 x - 70 x^{2} + \frac{10 x^{3}}{7} + 7 \cdot - 5 \frac{x^{4}}{7 \cdot 343} + {(\frac{x}{7})}^{5}$

解题步骤 3.5.2.1.2.19.4

重写表达式。

$y = - 16807 + 1715 x - 70 x^{2} + \frac{10 x^{3}}{7} - 5 \frac{x^{4}}{343} + {(\frac{x}{7})}^{5}$

解题步骤 3.5.2.1.2.20

组合 $- 5$ 和 $\frac{x^{4}}{343}$ 。

$y = - 16807 + 1715 x - 70 x^{2} + \frac{10 x^{3}}{7} + \frac{- 5 x^{4}}{343} + {(\frac{x}{7})}^{5}$

解题步骤 3.5.2.1.2.21

将负号移到分数的前面。

$y = - 16807 + 1715 x - 70 x^{2} + \frac{10 x^{3}}{7} - \frac{5 x^{4}}{343} + {(\frac{x}{7})}^{5}$

解题步骤 3.5.2.1.2.22

对 $\frac{x}{7}$ 运用乘积法则。

$y = - 16807 + 1715 x - 70 x^{2} + \frac{10 x^{3}}{7} - \frac{5 x^{4}}{343} + \frac{x^{5}}{7^{5}}$

解题步骤 3.5.2.1.2.23

对 $7$ 进行 $5$ 次方运算。

$y = - 16807 + 1715 x - 70 x^{2} + \frac{10 x^{3}}{7} - \frac{5 x^{4}}{343} + \frac{x^{5}}{16807}$

解题步骤 3.6

化简 $- 16807 + 1715 x - 70 x^{2} + \frac{10 x^{3}}{7} - \frac{5 x^{4}}{343} + \frac{x^{5}}{16807}$ 。

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解题步骤 3.6.1

移动 $- 16807$ 。

$y = 1715 x - 70 x^{2} + \frac{10 x^{3}}{7} - \frac{5 x^{4}}{343} + \frac{x^{5}}{16807} - 16807$

解题步骤 3.6.2

移动 $1715 x$ 。

$y = - 70 x^{2} + \frac{10 x^{3}}{7} - \frac{5 x^{4}}{343} + \frac{x^{5}}{16807} + 1715 x - 16807$

解题步骤 3.6.3

移动 $- 70 x^{2}$ 。

$y = \frac{10 x^{3}}{7} - \frac{5 x^{4}}{343} + \frac{x^{5}}{16807} - 70 x^{2} + 1715 x - 16807$

解题步骤 3.6.4

移动 $\frac{10 x^{3}}{7}$ 。

$y = - \frac{5 x^{4}}{343} + \frac{x^{5}}{16807} + \frac{10 x^{3}}{7} - 70 x^{2} + 1715 x - 16807$

解题步骤 3.6.5

将 $- \frac{5 x^{4}}{343}$ 和 $\frac{x^{5}}{16807}$ 重新排序。

$y = \frac{x^{5}}{16807} - \frac{5 x^{4}}{343} + \frac{10 x^{3}}{7} - 70 x^{2} + 1715 x - 16807$

解题步骤 4

使用 $f^{- 1} (x)$ 替换 $y$ ，以得到最终答案。

$f^{- 1} (x) = \frac{x^{5}}{16807} - \frac{5 x^{4}}{343} + \frac{10 x^{3}}{7} - 70 x^{2} + 1715 x - 16807$

解题步骤 5

验证 $f^{- 1} (x) = \frac{x^{5}}{16807} - \frac{5 x^{4}}{343} + \frac{10 x^{3}}{7} - 70 x^{2} + 1715 x - 16807$ 是否为 $f (x) = 7 (x^{\frac{1}{5}} + 7)$ 的反函数。

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解题步骤 5.1

要验证反函数，请检查 $f^{- 1} (f (x)) = x$ 和 $f (f^{- 1} (x)) = x$ 是否成立。

解题步骤 5.2

计算 $f^{- 1} (f (x))$ 。

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解题步骤 5.2.1

建立复合结果函数。

$f^{- 1} (f (x))$

解题步骤 5.2.2

通过将 $f$ 的值代入 $f^{- 1}$ 来计算 $f^{- 1} (7 (x^{\frac{1}{5}} + 7))$ 。

$f^{- 1} (7 (x^{\frac{1}{5}} + 7)) = \frac{{(7 (x^{\frac{1}{5}} + 7))}^{5}}{16807} - \frac{5 {(7 (x^{\frac{1}{5}} + 7))}^{4}}{343} + \frac{10 {(7 (x^{\frac{1}{5}} + 7))}^{3}}{7} - 70 {(7 (x^{\frac{1}{5}} + 7))}^{2} + 1715 (7 (x^{\frac{1}{5}} + 7)) - 16807$

解题步骤 5.2.3

化简每一项。

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解题步骤 5.2.3.1

化简分子。

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解题步骤 5.2.3.1.1

对 $7 (x^{\frac{1}{5}} + 7)$ 运用乘积法则。

$f^{- 1} (7 (x^{\frac{1}{5}} + 7)) = \frac{7^{5} {(x^{\frac{1}{5}} + 7)}^{5}}{16807} - \frac{5 {(7 (x^{\frac{1}{5}} + 7))}^{4}}{343} + \frac{10 {(7 (x^{\frac{1}{5}} + 7))}^{3}}{7} - 70 {(7 (x^{\frac{1}{5}} + 7))}^{2} + 1715 (7 (x^{\frac{1}{5}} + 7)) - 16807$

解题步骤 5.2.3.1.2

对 $7$ 进行 $5$ 次方运算。

$f^{- 1} (7 (x^{\frac{1}{5}} + 7)) = \frac{16807 {(x^{\frac{1}{5}} + 7)}^{5}}{16807} - \frac{5 {(7 (x^{\frac{1}{5}} + 7))}^{4}}{343} + \frac{10 {(7 (x^{\frac{1}{5}} + 7))}^{3}}{7} - 70 {(7 (x^{\frac{1}{5}} + 7))}^{2} + 1715 (7 (x^{\frac{1}{5}} + 7)) - 16807$

解题步骤 5.2.3.2

约去公因数。

解题步骤 5.2.3.3

用 ${(x^{\frac{1}{5}} + 7)}^{5}$ 除以 $1$ 。

$f^{- 1} (7 (x^{\frac{1}{5}} + 7)) = {(x^{\frac{1}{5}} + 7)}^{5} - \frac{5 {(7 (x^{\frac{1}{5}} + 7))}^{4}}{343} + \frac{10 {(7 (x^{\frac{1}{5}} + 7))}^{3}}{7} - 70 {(7 (x^{\frac{1}{5}} + 7))}^{2} + 1715 (7 (x^{\frac{1}{5}} + 7)) - 16807$

解题步骤 5.2.3.4

使用二项式定理。

$f^{- 1} (7 (x^{\frac{1}{5}} + 7)) = {(x^{\frac{1}{5}})}^{5} + 5 {(x^{\frac{1}{5}})}^{4} \cdot 7 + 10 {(x^{\frac{1}{5}})}^{3} \cdot 7^{2} + 10 {(x^{\frac{1}{5}})}^{2} \cdot 7^{3} + 5 x^{\frac{1}{5}} \cdot 7^{4} + 7^{5} - \frac{5 {(7 (x^{\frac{1}{5}} + 7))}^{4}}{343} + \frac{10 {(7 (x^{\frac{1}{5}} + 7))}^{3}}{7} - 70 {(7 (x^{\frac{1}{5}} + 7))}^{2} + 1715 (7 (x^{\frac{1}{5}} + 7)) - 16807$

解题步骤 5.2.3.5

化简每一项。

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解题步骤 5.2.3.5.1

将 ${(x^{\frac{1}{5}})}^{5}$ 中的指数相乘。

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解题步骤 5.2.3.5.1.1

运用幂法则并将指数相乘， ${(a^{m})}^{n} = a^{m n}$ 。

$f^{- 1} (7 (x^{\frac{1}{5}} + 7)) = x^{\frac{1}{5} \cdot 5} + 5 {(x^{\frac{1}{5}})}^{4} \cdot 7 + 10 {(x^{\frac{1}{5}})}^{3} \cdot 7^{2} + 10 {(x^{\frac{1}{5}})}^{2} \cdot 7^{3} + 5 x^{\frac{1}{5}} \cdot 7^{4} + 7^{5} - \frac{5 {(7 (x^{\frac{1}{5}} + 7))}^{4}}{343} + \frac{10 {(7 (x^{\frac{1}{5}} + 7))}^{3}}{7} - 70 {(7 (x^{\frac{1}{5}} + 7))}^{2} + 1715 (7 (x^{\frac{1}{5}} + 7)) - 16807$

解题步骤 5.2.3.5.1.2

约去 $5$ 的公因数。

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解题步骤 5.2.3.5.1.2.1

约去公因数。

解题步骤 5.2.3.5.1.2.2

重写表达式。

$f^{- 1} (7 (x^{\frac{1}{5}} + 7)) = x + 5 {(x^{\frac{1}{5}})}^{4} \cdot 7 + 10 {(x^{\frac{1}{5}})}^{3} \cdot 7^{2} + 10 {(x^{\frac{1}{5}})}^{2} \cdot 7^{3} + 5 x^{\frac{1}{5}} \cdot 7^{4} + 7^{5} - \frac{5 {(7 (x^{\frac{1}{5}} + 7))}^{4}}{343} + \frac{10 {(7 (x^{\frac{1}{5}} + 7))}^{3}}{7} - 70 {(7 (x^{\frac{1}{5}} + 7))}^{2} + 1715 (7 (x^{\frac{1}{5}} + 7)) - 16807$

解题步骤 5.2.3.5.2

化简。

解题步骤 5.2.3.5.3

将 ${(x^{\frac{1}{5}})}^{4}$ 中的指数相乘。

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解题步骤 5.2.3.5.3.1

运用幂法则并将指数相乘， ${(a^{m})}^{n} = a^{m n}$ 。

$f^{- 1} (7 (x^{\frac{1}{5}} + 7)) = x + 5 x^{\frac{1}{5} \cdot 4} \cdot 7 + 10 {(x^{\frac{1}{5}})}^{3} \cdot 7^{2} + 10 {(x^{\frac{1}{5}})}^{2} \cdot 7^{3} + 5 x^{\frac{1}{5}} \cdot 7^{4} + 7^{5} - \frac{5 {(7 (x^{\frac{1}{5}} + 7))}^{4}}{343} + \frac{10 {(7 (x^{\frac{1}{5}} + 7))}^{3}}{7} - 70 {(7 (x^{\frac{1}{5}} + 7))}^{2} + 1715 (7 (x^{\frac{1}{5}} + 7)) - 16807$

解题步骤 5.2.3.5.3.2

组合 $\frac{1}{5}$ 和 $4$ 。

$f^{- 1} (7 (x^{\frac{1}{5}} + 7)) = x + 5 x^{\frac{4}{5}} \cdot 7 + 10 {(x^{\frac{1}{5}})}^{3} \cdot 7^{2} + 10 {(x^{\frac{1}{5}})}^{2} \cdot 7^{3} + 5 x^{\frac{1}{5}} \cdot 7^{4} + 7^{5} - \frac{5 {(7 (x^{\frac{1}{5}} + 7))}^{4}}{343} + \frac{10 {(7 (x^{\frac{1}{5}} + 7))}^{3}}{7} - 70 {(7 (x^{\frac{1}{5}} + 7))}^{2} + 1715 (7 (x^{\frac{1}{5}} + 7)) - 16807$

解题步骤 5.2.3.5.4

将 $7$ 乘以 $5$ 。

$f^{- 1} (7 (x^{\frac{1}{5}} + 7)) = x + 35 x^{\frac{4}{5}} + 10 {(x^{\frac{1}{5}})}^{3} \cdot 7^{2} + 10 {(x^{\frac{1}{5}})}^{2} \cdot 7^{3} + 5 x^{\frac{1}{5}} \cdot 7^{4} + 7^{5} - \frac{5 {(7 (x^{\frac{1}{5}} + 7))}^{4}}{343} + \frac{10 {(7 (x^{\frac{1}{5}} + 7))}^{3}}{7} - 70 {(7 (x^{\frac{1}{5}} + 7))}^{2} + 1715 (7 (x^{\frac{1}{5}} + 7)) - 16807$

解题步骤 5.2.3.5.5

将 ${(x^{\frac{1}{5}})}^{3}$ 中的指数相乘。

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解题步骤 5.2.3.5.5.1

运用幂法则并将指数相乘， ${(a^{m})}^{n} = a^{m n}$ 。

$f^{- 1} (7 (x^{\frac{1}{5}} + 7)) = x + 35 x^{\frac{4}{5}} + 10 x^{\frac{1}{5} \cdot 3} \cdot 7^{2} + 10 {(x^{\frac{1}{5}})}^{2} \cdot 7^{3} + 5 x^{\frac{1}{5}} \cdot 7^{4} + 7^{5} - \frac{5 {(7 (x^{\frac{1}{5}} + 7))}^{4}}{343} + \frac{10 {(7 (x^{\frac{1}{5}} + 7))}^{3}}{7} - 70 {(7 (x^{\frac{1}{5}} + 7))}^{2} + 1715 (7 (x^{\frac{1}{5}} + 7)) - 16807$

解题步骤 5.2.3.5.5.2

组合 $\frac{1}{5}$ 和 $3$ 。

$f^{- 1} (7 (x^{\frac{1}{5}} + 7)) = x + 35 x^{\frac{4}{5}} + 10 x^{\frac{3}{5}} \cdot 7^{2} + 10 {(x^{\frac{1}{5}})}^{2} \cdot 7^{3} + 5 x^{\frac{1}{5}} \cdot 7^{4} + 7^{5} - \frac{5 {(7 (x^{\frac{1}{5}} + 7))}^{4}}{343} + \frac{10 {(7 (x^{\frac{1}{5}} + 7))}^{3}}{7} - 70 {(7 (x^{\frac{1}{5}} + 7))}^{2} + 1715 (7 (x^{\frac{1}{5}} + 7)) - 16807$

解题步骤 5.2.3.5.6

对 $7$ 进行 $2$ 次方运算。

$f^{- 1} (7 (x^{\frac{1}{5}} + 7)) = x + 35 x^{\frac{4}{5}} + 10 x^{\frac{3}{5}} \cdot 49 + 10 {(x^{\frac{1}{5}})}^{2} \cdot 7^{3} + 5 x^{\frac{1}{5}} \cdot 7^{4} + 7^{5} - \frac{5 {(7 (x^{\frac{1}{5}} + 7))}^{4}}{343} + \frac{10 {(7 (x^{\frac{1}{5}} + 7))}^{3}}{7} - 70 {(7 (x^{\frac{1}{5}} + 7))}^{2} + 1715 (7 (x^{\frac{1}{5}} + 7)) - 16807$

解题步骤 5.2.3.5.7

将 $49$ 乘以 $10$ 。

$f^{- 1} (7 (x^{\frac{1}{5}} + 7)) = x + 35 x^{\frac{4}{5}} + 490 x^{\frac{3}{5}} + 10 {(x^{\frac{1}{5}})}^{2} \cdot 7^{3} + 5 x^{\frac{1}{5}} \cdot 7^{4} + 7^{5} - \frac{5 {(7 (x^{\frac{1}{5}} + 7))}^{4}}{343} + \frac{10 {(7 (x^{\frac{1}{5}} + 7))}^{3}}{7} - 70 {(7 (x^{\frac{1}{5}} + 7))}^{2} + 1715 (7 (x^{\frac{1}{5}} + 7)) - 16807$

解题步骤 5.2.3.5.8

将 ${(x^{\frac{1}{5}})}^{2}$ 中的指数相乘。

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解题步骤 5.2.3.5.8.1

运用幂法则并将指数相乘， ${(a^{m})}^{n} = a^{m n}$ 。

$f^{- 1} (7 (x^{\frac{1}{5}} + 7)) = x + 35 x^{\frac{4}{5}} + 490 x^{\frac{3}{5}} + 10 x^{\frac{1}{5} \cdot 2} \cdot 7^{3} + 5 x^{\frac{1}{5}} \cdot 7^{4} + 7^{5} - \frac{5 {(7 (x^{\frac{1}{5}} + 7))}^{4}}{343} + \frac{10 {(7 (x^{\frac{1}{5}} + 7))}^{3}}{7} - 70 {(7 (x^{\frac{1}{5}} + 7))}^{2} + 1715 (7 (x^{\frac{1}{5}} + 7)) - 16807$

解题步骤 5.2.3.5.8.2

组合 $\frac{1}{5}$ 和 $2$ 。

$f^{- 1} (7 (x^{\frac{1}{5}} + 7)) = x + 35 x^{\frac{4}{5}} + 490 x^{\frac{3}{5}} + 10 x^{\frac{2}{5}} \cdot 7^{3} + 5 x^{\frac{1}{5}} \cdot 7^{4} + 7^{5} - \frac{5 {(7 (x^{\frac{1}{5}} + 7))}^{4}}{343} + \frac{10 {(7 (x^{\frac{1}{5}} + 7))}^{3}}{7} - 70 {(7 (x^{\frac{1}{5}} + 7))}^{2} + 1715 (7 (x^{\frac{1}{5}} + 7)) - 16807$

解题步骤 5.2.3.5.9

对 $7$ 进行 $3$ 次方运算。

$f^{- 1} (7 (x^{\frac{1}{5}} + 7)) = x + 35 x^{\frac{4}{5}} + 490 x^{\frac{3}{5}} + 10 x^{\frac{2}{5}} \cdot 343 + 5 x^{\frac{1}{5}} \cdot 7^{4} + 7^{5} - \frac{5 {(7 (x^{\frac{1}{5}} + 7))}^{4}}{343} + \frac{10 {(7 (x^{\frac{1}{5}} + 7))}^{3}}{7} - 70 {(7 (x^{\frac{1}{5}} + 7))}^{2} + 1715 (7 (x^{\frac{1}{5}} + 7)) - 16807$

解题步骤 5.2.3.5.10

将 $343$ 乘以 $10$ 。

$f^{- 1} (7 (x^{\frac{1}{5}} + 7)) = x + 35 x^{\frac{4}{5}} + 490 x^{\frac{3}{5}} + 3430 x^{\frac{2}{5}} + 5 x^{\frac{1}{5}} \cdot 7^{4} + 7^{5} - \frac{5 {(7 (x^{\frac{1}{5}} + 7))}^{4}}{343} + \frac{10 {(7 (x^{\frac{1}{5}} + 7))}^{3}}{7} - 70 {(7 (x^{\frac{1}{5}} + 7))}^{2} + 1715 (7 (x^{\frac{1}{5}} + 7)) - 16807$

解题步骤 5.2.3.5.11

对 $7$ 进行 $4$ 次方运算。

$f^{- 1} (7 (x^{\frac{1}{5}} + 7)) = x + 35 x^{\frac{4}{5}} + 490 x^{\frac{3}{5}} + 3430 x^{\frac{2}{5}} + 5 x^{\frac{1}{5}} \cdot 2401 + 7^{5} - \frac{5 {(7 (x^{\frac{1}{5}} + 7))}^{4}}{343} + \frac{10 {(7 (x^{\frac{1}{5}} + 7))}^{3}}{7} - 70 {(7 (x^{\frac{1}{5}} + 7))}^{2} + 1715 (7 (x^{\frac{1}{5}} + 7)) - 16807$

解题步骤 5.2.3.5.12

将 $2401$ 乘以 $5$ 。

$f^{- 1} (7 (x^{\frac{1}{5}} + 7)) = x + 35 x^{\frac{4}{5}} + 490 x^{\frac{3}{5}} + 3430 x^{\frac{2}{5}} + 12005 x^{\frac{1}{5}} + 7^{5} - \frac{5 {(7 (x^{\frac{1}{5}} + 7))}^{4}}{343} + \frac{10 {(7 (x^{\frac{1}{5}} + 7))}^{3}}{7} - 70 {(7 (x^{\frac{1}{5}} + 7))}^{2} + 1715 (7 (x^{\frac{1}{5}} + 7)) - 16807$

解题步骤 5.2.3.5.13

对 $7$ 进行 $5$ 次方运算。

$f^{- 1} (7 (x^{\frac{1}{5}} + 7)) = x + 35 x^{\frac{4}{5}} + 490 x^{\frac{3}{5}} + 3430 x^{\frac{2}{5}} + 12005 x^{\frac{1}{5}} + 16807 - \frac{5 {(7 (x^{\frac{1}{5}} + 7))}^{4}}{343} + \frac{10 {(7 (x^{\frac{1}{5}} + 7))}^{3}}{7} - 70 {(7 (x^{\frac{1}{5}} + 7))}^{2} + 1715 (7 (x^{\frac{1}{5}} + 7)) - 16807$

解题步骤 5.2.3.6

化简分子。

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解题步骤 5.2.3.6.1

对 $7 (x^{\frac{1}{5}} + 7)$ 运用乘积法则。

$f^{- 1} (7 (x^{\frac{1}{5}} + 7)) = x + 35 x^{\frac{4}{5}} + 490 x^{\frac{3}{5}} + 3430 x^{\frac{2}{5}} + 12005 x^{\frac{1}{5}} + 16807 - \frac{5 \cdot (7^{4} {(x^{\frac{1}{5}} + 7)}^{4})}{343} + \frac{10 {(7 (x^{\frac{1}{5}} + 7))}^{3}}{7} - 70 {(7 (x^{\frac{1}{5}} + 7))}^{2} + 1715 (7 (x^{\frac{1}{5}} + 7)) - 16807$

解题步骤 5.2.3.6.2

对 $7$ 进行 $4$ 次方运算。

$f^{- 1} (7 (x^{\frac{1}{5}} + 7)) = x + 35 x^{\frac{4}{5}} + 490 x^{\frac{3}{5}} + 3430 x^{\frac{2}{5}} + 12005 x^{\frac{1}{5}} + 16807 - \frac{5 \cdot (2401 {(x^{\frac{1}{5}} + 7)}^{4})}{343} + \frac{10 {(7 (x^{\frac{1}{5}} + 7))}^{3}}{7} - 70 {(7 (x^{\frac{1}{5}} + 7))}^{2} + 1715 (7 (x^{\frac{1}{5}} + 7)) - 16807$

解题步骤 5.2.3.6.3

将 $5$ 乘以 $2401$ 。

$f^{- 1} (7 (x^{\frac{1}{5}} + 7)) = x + 35 x^{\frac{4}{5}} + 490 x^{\frac{3}{5}} + 3430 x^{\frac{2}{5}} + 12005 x^{\frac{1}{5}} + 16807 - \frac{12005 {(x^{\frac{1}{5}} + 7)}^{4}}{343} + \frac{10 {(7 (x^{\frac{1}{5}} + 7))}^{3}}{7} - 70 {(7 (x^{\frac{1}{5}} + 7))}^{2} + 1715 (7 (x^{\frac{1}{5}} + 7)) - 16807$

解题步骤 5.2.3.7

从 $12005 {(x^{\frac{1}{5}} + 7)}^{4}$ 中分解出因数 $343$ 。

$f^{- 1} (7 (x^{\frac{1}{5}} + 7)) = x + 35 x^{\frac{4}{5}} + 490 x^{\frac{3}{5}} + 3430 x^{\frac{2}{5}} + 12005 x^{\frac{1}{5}} + 16807 - \frac{343 (35 {(x^{\frac{1}{5}} + 7)}^{4})}{343} + \frac{10 {(7 (x^{\frac{1}{5}} + 7))}^{3}}{7} - 70 {(7 (x^{\frac{1}{5}} + 7))}^{2} + 1715 (7 (x^{\frac{1}{5}} + 7)) - 16807$

解题步骤 5.2.3.8

约去公因数。

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解题步骤 5.2.3.8.1

从 $343$ 中分解出因数 $343$ 。

$f^{- 1} (7 (x^{\frac{1}{5}} + 7)) = x + 35 x^{\frac{4}{5}} + 490 x^{\frac{3}{5}} + 3430 x^{\frac{2}{5}} + 12005 x^{\frac{1}{5}} + 16807 - \frac{343 (35 {(x^{\frac{1}{5}} + 7)}^{4})}{343 (1)} + \frac{10 {(7 (x^{\frac{1}{5}} + 7))}^{3}}{7} - 70 {(7 (x^{\frac{1}{5}} + 7))}^{2} + 1715 (7 (x^{\frac{1}{5}} + 7)) - 16807$

解题步骤 5.2.3.8.2

约去公因数。

$f^{- 1} (7 (x^{\frac{1}{5}} + 7)) = x + 35 x^{\frac{4}{5}} + 490 x^{\frac{3}{5}} + 3430 x^{\frac{2}{5}} + 12005 x^{\frac{1}{5}} + 16807 - \frac{343 (35 {(x^{\frac{1}{5}} + 7)}^{4})}{343 \cdot 1} + \frac{10 {(7 (x^{\frac{1}{5}} + 7))}^{3}}{7} - 70 {(7 (x^{\frac{1}{5}} + 7))}^{2} + 1715 (7 (x^{\frac{1}{5}} + 7)) - 16807$

解题步骤 5.2.3.8.3

重写表达式。

$f^{- 1} (7 (x^{\frac{1}{5}} + 7)) = x + 35 x^{\frac{4}{5}} + 490 x^{\frac{3}{5}} + 3430 x^{\frac{2}{5}} + 12005 x^{\frac{1}{5}} + 16807 - \frac{35 {(x^{\frac{1}{5}} + 7)}^{4}}{1} + \frac{10 {(7 (x^{\frac{1}{5}} + 7))}^{3}}{7} - 70 {(7 (x^{\frac{1}{5}} + 7))}^{2} + 1715 (7 (x^{\frac{1}{5}} + 7)) - 16807$

解题步骤 5.2.3.8.4

用 $35 {(x^{\frac{1}{5}} + 7)}^{4}$ 除以 $1$ 。

$f^{- 1} (7 (x^{\frac{1}{5}} + 7)) = x + 35 x^{\frac{4}{5}} + 490 x^{\frac{3}{5}} + 3430 x^{\frac{2}{5}} + 12005 x^{\frac{1}{5}} + 16807 - (35 {(x^{\frac{1}{5}} + 7)}^{4}) + \frac{10 {(7 (x^{\frac{1}{5}} + 7))}^{3}}{7} - 70 {(7 (x^{\frac{1}{5}} + 7))}^{2} + 1715 (7 (x^{\frac{1}{5}} + 7)) - 16807$

解题步骤 5.2.3.9

使用二项式定理。

$f^{- 1} (7 (x^{\frac{1}{5}} + 7)) = x + 35 x^{\frac{4}{5}} + 490 x^{\frac{3}{5}} + 3430 x^{\frac{2}{5}} + 12005 x^{\frac{1}{5}} + 16807 - (35 ({(x^{\frac{1}{5}})}^{4} + 4 {(x^{\frac{1}{5}})}^{3} \cdot 7 + 6 {(x^{\frac{1}{5}})}^{2} \cdot 7^{2} + 4 x^{\frac{1}{5}} \cdot 7^{3} + 7^{4})) + \frac{10 {(7 (x^{\frac{1}{5}} + 7))}^{3}}{7} - 70 {(7 (x^{\frac{1}{5}} + 7))}^{2} + 1715 (7 (x^{\frac{1}{5}} + 7)) - 16807$

解题步骤 5.2.3.10

化简每一项。

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解题步骤 5.2.3.10.1

将 ${(x^{\frac{1}{5}})}^{4}$ 中的指数相乘。

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解题步骤 5.2.3.10.1.1

运用幂法则并将指数相乘， ${(a^{m})}^{n} = a^{m n}$ 。

$f^{- 1} (7 (x^{\frac{1}{5}} + 7)) = x + 35 x^{\frac{4}{5}} + 490 x^{\frac{3}{5}} + 3430 x^{\frac{2}{5}} + 12005 x^{\frac{1}{5}} + 16807 - (35 (x^{\frac{1}{5} \cdot 4} + 4 {(x^{\frac{1}{5}})}^{3} \cdot 7 + 6 {(x^{\frac{1}{5}})}^{2} \cdot 7^{2} + 4 x^{\frac{1}{5}} \cdot 7^{3} + 7^{4})) + \frac{10 {(7 (x^{\frac{1}{5}} + 7))}^{3}}{7} - 70 {(7 (x^{\frac{1}{5}} + 7))}^{2} + 1715 (7 (x^{\frac{1}{5}} + 7)) - 16807$

解题步骤 5.2.3.10.1.2

组合 $\frac{1}{5}$ 和 $4$ 。

$f^{- 1} (7 (x^{\frac{1}{5}} + 7)) = x + 35 x^{\frac{4}{5}} + 490 x^{\frac{3}{5}} + 3430 x^{\frac{2}{5}} + 12005 x^{\frac{1}{5}} + 16807 - (35 (x^{\frac{4}{5}} + 4 {(x^{\frac{1}{5}})}^{3} \cdot 7 + 6 {(x^{\frac{1}{5}})}^{2} \cdot 7^{2} + 4 x^{\frac{1}{5}} \cdot 7^{3} + 7^{4})) + \frac{10 {(7 (x^{\frac{1}{5}} + 7))}^{3}}{7} - 70 {(7 (x^{\frac{1}{5}} + 7))}^{2} + 1715 (7 (x^{\frac{1}{5}} + 7)) - 16807$

解题步骤 5.2.3.10.2

将 ${(x^{\frac{1}{5}})}^{3}$ 中的指数相乘。

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解题步骤 5.2.3.10.2.1

运用幂法则并将指数相乘， ${(a^{m})}^{n} = a^{m n}$ 。

$f^{- 1} (7 (x^{\frac{1}{5}} + 7)) = x + 35 x^{\frac{4}{5}} + 490 x^{\frac{3}{5}} + 3430 x^{\frac{2}{5}} + 12005 x^{\frac{1}{5}} + 16807 - (35 (x^{\frac{4}{5}} + 4 x^{\frac{1}{5} \cdot 3} \cdot 7 + 6 {(x^{\frac{1}{5}})}^{2} \cdot 7^{2} + 4 x^{\frac{1}{5}} \cdot 7^{3} + 7^{4})) + \frac{10 {(7 (x^{\frac{1}{5}} + 7))}^{3}}{7} - 70 {(7 (x^{\frac{1}{5}} + 7))}^{2} + 1715 (7 (x^{\frac{1}{5}} + 7)) - 16807$

解题步骤 5.2.3.10.2.2

组合 $\frac{1}{5}$ 和 $3$ 。

$f^{- 1} (7 (x^{\frac{1}{5}} + 7)) = x + 35 x^{\frac{4}{5}} + 490 x^{\frac{3}{5}} + 3430 x^{\frac{2}{5}} + 12005 x^{\frac{1}{5}} + 16807 - (35 (x^{\frac{4}{5}} + 4 x^{\frac{3}{5}} \cdot 7 + 6 {(x^{\frac{1}{5}})}^{2} \cdot 7^{2} + 4 x^{\frac{1}{5}} \cdot 7^{3} + 7^{4})) + \frac{10 {(7 (x^{\frac{1}{5}} + 7))}^{3}}{7} - 70 {(7 (x^{\frac{1}{5}} + 7))}^{2} + 1715 (7 (x^{\frac{1}{5}} + 7)) - 16807$

解题步骤 5.2.3.10.3

将 $7$ 乘以 $4$ 。

$f^{- 1} (7 (x^{\frac{1}{5}} + 7)) = x + 35 x^{\frac{4}{5}} + 490 x^{\frac{3}{5}} + 3430 x^{\frac{2}{5}} + 12005 x^{\frac{1}{5}} + 16807 - (35 (x^{\frac{4}{5}} + 28 x^{\frac{3}{5}} + 6 {(x^{\frac{1}{5}})}^{2} \cdot 7^{2} + 4 x^{\frac{1}{5}} \cdot 7^{3} + 7^{4})) + \frac{10 {(7 (x^{\frac{1}{5}} + 7))}^{3}}{7} - 70 {(7 (x^{\frac{1}{5}} + 7))}^{2} + 1715 (7 (x^{\frac{1}{5}} + 7)) - 16807$

解题步骤 5.2.3.10.4

将 ${(x^{\frac{1}{5}})}^{2}$ 中的指数相乘。

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解题步骤 5.2.3.10.4.1

运用幂法则并将指数相乘， ${(a^{m})}^{n} = a^{m n}$ 。

$f^{- 1} (7 (x^{\frac{1}{5}} + 7)) = x + 35 x^{\frac{4}{5}} + 490 x^{\frac{3}{5}} + 3430 x^{\frac{2}{5}} + 12005 x^{\frac{1}{5}} + 16807 - (35 (x^{\frac{4}{5}} + 28 x^{\frac{3}{5}} + 6 x^{\frac{1}{5} \cdot 2} \cdot 7^{2} + 4 x^{\frac{1}{5}} \cdot 7^{3} + 7^{4})) + \frac{10 {(7 (x^{\frac{1}{5}} + 7))}^{3}}{7} - 70 {(7 (x^{\frac{1}{5}} + 7))}^{2} + 1715 (7 (x^{\frac{1}{5}} + 7)) - 16807$

解题步骤 5.2.3.10.4.2

组合 $\frac{1}{5}$ 和 $2$ 。

$f^{- 1} (7 (x^{\frac{1}{5}} + 7)) = x + 35 x^{\frac{4}{5}} + 490 x^{\frac{3}{5}} + 3430 x^{\frac{2}{5}} + 12005 x^{\frac{1}{5}} + 16807 - (35 (x^{\frac{4}{5}} + 28 x^{\frac{3}{5}} + 6 x^{\frac{2}{5}} \cdot 7^{2} + 4 x^{\frac{1}{5}} \cdot 7^{3} + 7^{4})) + \frac{10 {(7 (x^{\frac{1}{5}} + 7))}^{3}}{7} - 70 {(7 (x^{\frac{1}{5}} + 7))}^{2} + 1715 (7 (x^{\frac{1}{5}} + 7)) - 16807$

解题步骤 5.2.3.10.5

对 $7$ 进行 $2$ 次方运算。

$f^{- 1} (7 (x^{\frac{1}{5}} + 7)) = x + 35 x^{\frac{4}{5}} + 490 x^{\frac{3}{5}} + 3430 x^{\frac{2}{5}} + 12005 x^{\frac{1}{5}} + 16807 - (35 (x^{\frac{4}{5}} + 28 x^{\frac{3}{5}} + 6 x^{\frac{2}{5}} \cdot 49 + 4 x^{\frac{1}{5}} \cdot 7^{3} + 7^{4})) + \frac{10 {(7 (x^{\frac{1}{5}} + 7))}^{3}}{7} - 70 {(7 (x^{\frac{1}{5}} + 7))}^{2} + 1715 (7 (x^{\frac{1}{5}} + 7)) - 16807$

解题步骤 5.2.3.10.6

将 $49$ 乘以 $6$ 。

$f^{- 1} (7 (x^{\frac{1}{5}} + 7)) = x + 35 x^{\frac{4}{5}} + 490 x^{\frac{3}{5}} + 3430 x^{\frac{2}{5}} + 12005 x^{\frac{1}{5}} + 16807 - (35 (x^{\frac{4}{5}} + 28 x^{\frac{3}{5}} + 294 x^{\frac{2}{5}} + 4 x^{\frac{1}{5}} \cdot 7^{3} + 7^{4})) + \frac{10 {(7 (x^{\frac{1}{5}} + 7))}^{3}}{7} - 70 {(7 (x^{\frac{1}{5}} + 7))}^{2} + 1715 (7 (x^{\frac{1}{5}} + 7)) - 16807$

解题步骤 5.2.3.10.7

对 $7$ 进行 $3$ 次方运算。

$f^{- 1} (7 (x^{\frac{1}{5}} + 7)) = x + 35 x^{\frac{4}{5}} + 490 x^{\frac{3}{5}} + 3430 x^{\frac{2}{5}} + 12005 x^{\frac{1}{5}} + 16807 - (35 (x^{\frac{4}{5}} + 28 x^{\frac{3}{5}} + 294 x^{\frac{2}{5}} + 4 x^{\frac{1}{5}} \cdot 343 + 7^{4})) + \frac{10 {(7 (x^{\frac{1}{5}} + 7))}^{3}}{7} - 70 {(7 (x^{\frac{1}{5}} + 7))}^{2} + 1715 (7 (x^{\frac{1}{5}} + 7)) - 16807$

解题步骤 5.2.3.10.8

将 $343$ 乘以 $4$ 。

$f^{- 1} (7 (x^{\frac{1}{5}} + 7)) = x + 35 x^{\frac{4}{5}} + 490 x^{\frac{3}{5}} + 3430 x^{\frac{2}{5}} + 12005 x^{\frac{1}{5}} + 16807 - (35 (x^{\frac{4}{5}} + 28 x^{\frac{3}{5}} + 294 x^{\frac{2}{5}} + 1372 x^{\frac{1}{5}} + 7^{4})) + \frac{10 {(7 (x^{\frac{1}{5}} + 7))}^{3}}{7} - 70 {(7 (x^{\frac{1}{5}} + 7))}^{2} + 1715 (7 (x^{\frac{1}{5}} + 7)) - 16807$

解题步骤 5.2.3.10.9

对 $7$ 进行 $4$ 次方运算。

$f^{- 1} (7 (x^{\frac{1}{5}} + 7)) = x + 35 x^{\frac{4}{5}} + 490 x^{\frac{3}{5}} + 3430 x^{\frac{2}{5}} + 12005 x^{\frac{1}{5}} + 16807 - (35 (x^{\frac{4}{5}} + 28 x^{\frac{3}{5}} + 294 x^{\frac{2}{5}} + 1372 x^{\frac{1}{5}} + 2401)) + \frac{10 {(7 (x^{\frac{1}{5}} + 7))}^{3}}{7} - 70 {(7 (x^{\frac{1}{5}} + 7))}^{2} + 1715 (7 (x^{\frac{1}{5}} + 7)) - 16807$

解题步骤 5.2.3.11

运用分配律。

$f^{- 1} (7 (x^{\frac{1}{5}} + 7)) = x + 35 x^{\frac{4}{5}} + 490 x^{\frac{3}{5}} + 3430 x^{\frac{2}{5}} + 12005 x^{\frac{1}{5}} + 16807 - (35 x^{\frac{4}{5}} + 35 (28 x^{\frac{3}{5}}) + 35 (294 x^{\frac{2}{5}}) + 35 (1372 x^{\frac{1}{5}}) + 35 \cdot 2401) + \frac{10 {(7 (x^{\frac{1}{5}} + 7))}^{3}}{7} - 70 {(7 (x^{\frac{1}{5}} + 7))}^{2} + 1715 (7 (x^{\frac{1}{5}} + 7)) - 16807$

解题步骤 5.2.3.12

化简。

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解题步骤 5.2.3.12.1

将 $28$ 乘以 $35$ 。

$f^{- 1} (7 (x^{\frac{1}{5}} + 7)) = x + 35 x^{\frac{4}{5}} + 490 x^{\frac{3}{5}} + 3430 x^{\frac{2}{5}} + 12005 x^{\frac{1}{5}} + 16807 - (35 x^{\frac{4}{5}} + 980 x^{\frac{3}{5}} + 35 (294 x^{\frac{2}{5}}) + 35 (1372 x^{\frac{1}{5}}) + 35 \cdot 2401) + \frac{10 {(7 (x^{\frac{1}{5}} + 7))}^{3}}{7} - 70 {(7 (x^{\frac{1}{5}} + 7))}^{2} + 1715 (7 (x^{\frac{1}{5}} + 7)) - 16807$

解题步骤 5.2.3.12.2

将 $294$ 乘以 $35$ 。

$f^{- 1} (7 (x^{\frac{1}{5}} + 7)) = x + 35 x^{\frac{4}{5}} + 490 x^{\frac{3}{5}} + 3430 x^{\frac{2}{5}} + 12005 x^{\frac{1}{5}} + 16807 - (35 x^{\frac{4}{5}} + 980 x^{\frac{3}{5}} + 10290 x^{\frac{2}{5}} + 35 (1372 x^{\frac{1}{5}}) + 35 \cdot 2401) + \frac{10 {(7 (x^{\frac{1}{5}} + 7))}^{3}}{7} - 70 {(7 (x^{\frac{1}{5}} + 7))}^{2} + 1715 (7 (x^{\frac{1}{5}} + 7)) - 16807$

解题步骤 5.2.3.12.3

将 $1372$ 乘以 $35$ 。

$f^{- 1} (7 (x^{\frac{1}{5}} + 7)) = x + 35 x^{\frac{4}{5}} + 490 x^{\frac{3}{5}} + 3430 x^{\frac{2}{5}} + 12005 x^{\frac{1}{5}} + 16807 - (35 x^{\frac{4}{5}} + 980 x^{\frac{3}{5}} + 10290 x^{\frac{2}{5}} + 48020 x^{\frac{1}{5}} + 35 \cdot 2401) + \frac{10 {(7 (x^{\frac{1}{5}} + 7))}^{3}}{7} - 70 {(7 (x^{\frac{1}{5}} + 7))}^{2} + 1715 (7 (x^{\frac{1}{5}} + 7)) - 16807$

解题步骤 5.2.3.12.4

将 $35$ 乘以 $2401$ 。

$f^{- 1} (7 (x^{\frac{1}{5}} + 7)) = x + 35 x^{\frac{4}{5}} + 490 x^{\frac{3}{5}} + 3430 x^{\frac{2}{5}} + 12005 x^{\frac{1}{5}} + 16807 - (35 x^{\frac{4}{5}} + 980 x^{\frac{3}{5}} + 10290 x^{\frac{2}{5}} + 48020 x^{\frac{1}{5}} + 84035) + \frac{10 {(7 (x^{\frac{1}{5}} + 7))}^{3}}{7} - 70 {(7 (x^{\frac{1}{5}} + 7))}^{2} + 1715 (7 (x^{\frac{1}{5}} + 7)) - 16807$

解题步骤 5.2.3.13

运用分配律。

$f^{- 1} (7 (x^{\frac{1}{5}} + 7)) = x + 35 x^{\frac{4}{5}} + 490 x^{\frac{3}{5}} + 3430 x^{\frac{2}{5}} + 12005 x^{\frac{1}{5}} + 16807 - (35 x^{\frac{4}{5}}) - (980 x^{\frac{3}{5}}) - (10290 x^{\frac{2}{5}}) - (48020 x^{\frac{1}{5}}) - 1 \cdot 84035 + \frac{10 {(7 (x^{\frac{1}{5}} + 7))}^{3}}{7} - 70 {(7 (x^{\frac{1}{5}} + 7))}^{2} + 1715 (7 (x^{\frac{1}{5}} + 7)) - 16807$

解题步骤 5.2.3.14

化简。

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解题步骤 5.2.3.14.1

将 $35$ 乘以 $- 1$ 。

$f^{- 1} (7 (x^{\frac{1}{5}} + 7)) = x + 35 x^{\frac{4}{5}} + 490 x^{\frac{3}{5}} + 3430 x^{\frac{2}{5}} + 12005 x^{\frac{1}{5}} + 16807 - 35 x^{\frac{4}{5}} - (980 x^{\frac{3}{5}}) - (10290 x^{\frac{2}{5}}) - (48020 x^{\frac{1}{5}}) - 1 \cdot 84035 + \frac{10 {(7 (x^{\frac{1}{5}} + 7))}^{3}}{7} - 70 {(7 (x^{\frac{1}{5}} + 7))}^{2} + 1715 (7 (x^{\frac{1}{5}} + 7)) - 16807$

解题步骤 5.2.3.14.2

将 $980$ 乘以 $- 1$ 。

$f^{- 1} (7 (x^{\frac{1}{5}} + 7)) = x + 35 x^{\frac{4}{5}} + 490 x^{\frac{3}{5}} + 3430 x^{\frac{2}{5}} + 12005 x^{\frac{1}{5}} + 16807 - 35 x^{\frac{4}{5}} - 980 x^{\frac{3}{5}} - (10290 x^{\frac{2}{5}}) - (48020 x^{\frac{1}{5}}) - 1 \cdot 84035 + \frac{10 {(7 (x^{\frac{1}{5}} + 7))}^{3}}{7} - 70 {(7 (x^{\frac{1}{5}} + 7))}^{2} + 1715 (7 (x^{\frac{1}{5}} + 7)) - 16807$

解题步骤 5.2.3.14.3

将 $10290$ 乘以 $- 1$ 。

$f^{- 1} (7 (x^{\frac{1}{5}} + 7)) = x + 35 x^{\frac{4}{5}} + 490 x^{\frac{3}{5}} + 3430 x^{\frac{2}{5}} + 12005 x^{\frac{1}{5}} + 16807 - 35 x^{\frac{4}{5}} - 980 x^{\frac{3}{5}} - 10290 x^{\frac{2}{5}} - (48020 x^{\frac{1}{5}}) - 1 \cdot 84035 + \frac{10 {(7 (x^{\frac{1}{5}} + 7))}^{3}}{7} - 70 {(7 (x^{\frac{1}{5}} + 7))}^{2} + 1715 (7 (x^{\frac{1}{5}} + 7)) - 16807$

解题步骤 5.2.3.14.4

将 $48020$ 乘以 $- 1$ 。

$f^{- 1} (7 (x^{\frac{1}{5}} + 7)) = x + 35 x^{\frac{4}{5}} + 490 x^{\frac{3}{5}} + 3430 x^{\frac{2}{5}} + 12005 x^{\frac{1}{5}} + 16807 - 35 x^{\frac{4}{5}} - 980 x^{\frac{3}{5}} - 10290 x^{\frac{2}{5}} - 48020 x^{\frac{1}{5}} - 1 \cdot 84035 + \frac{10 {(7 (x^{\frac{1}{5}} + 7))}^{3}}{7} - 70 {(7 (x^{\frac{1}{5}} + 7))}^{2} + 1715 (7 (x^{\frac{1}{5}} + 7)) - 16807$

解题步骤 5.2.3.14.5

将 $- 1$ 乘以 $84035$ 。

$f^{- 1} (7 (x^{\frac{1}{5}} + 7)) = x + 35 x^{\frac{4}{5}} + 490 x^{\frac{3}{5}} + 3430 x^{\frac{2}{5}} + 12005 x^{\frac{1}{5}} + 16807 - 35 x^{\frac{4}{5}} - 980 x^{\frac{3}{5}} - 10290 x^{\frac{2}{5}} - 48020 x^{\frac{1}{5}} - 84035 + \frac{10 {(7 (x^{\frac{1}{5}} + 7))}^{3}}{7} - 70 {(7 (x^{\frac{1}{5}} + 7))}^{2} + 1715 (7 (x^{\frac{1}{5}} + 7)) - 16807$

解题步骤 5.2.3.15

化简分子。

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解题步骤 5.2.3.15.1

对 $7 (x^{\frac{1}{5}} + 7)$ 运用乘积法则。

$f^{- 1} (7 (x^{\frac{1}{5}} + 7)) = x + 35 x^{\frac{4}{5}} + 490 x^{\frac{3}{5}} + 3430 x^{\frac{2}{5}} + 12005 x^{\frac{1}{5}} + 16807 - 35 x^{\frac{4}{5}} - 980 x^{\frac{3}{5}} - 10290 x^{\frac{2}{5}} - 48020 x^{\frac{1}{5}} - 84035 + \frac{10 \cdot (7^{3} {(x^{\frac{1}{5}} + 7)}^{3})}{7} - 70 {(7 (x^{\frac{1}{5}} + 7))}^{2} + 1715 (7 (x^{\frac{1}{5}} + 7)) - 16807$

解题步骤 5.2.3.15.2

对 $7$ 进行 $3$ 次方运算。

$f^{- 1} (7 (x^{\frac{1}{5}} + 7)) = x + 35 x^{\frac{4}{5}} + 490 x^{\frac{3}{5}} + 3430 x^{\frac{2}{5}} + 12005 x^{\frac{1}{5}} + 16807 - 35 x^{\frac{4}{5}} - 980 x^{\frac{3}{5}} - 10290 x^{\frac{2}{5}} - 48020 x^{\frac{1}{5}} - 84035 + \frac{10 \cdot (343 {(x^{\frac{1}{5}} + 7)}^{3})}{7} - 70 {(7 (x^{\frac{1}{5}} + 7))}^{2} + 1715 (7 (x^{\frac{1}{5}} + 7)) - 16807$

解题步骤 5.2.3.15.3

将 $10$ 乘以 $343$ 。

$f^{- 1} (7 (x^{\frac{1}{5}} + 7)) = x + 35 x^{\frac{4}{5}} + 490 x^{\frac{3}{5}} + 3430 x^{\frac{2}{5}} + 12005 x^{\frac{1}{5}} + 16807 - 35 x^{\frac{4}{5}} - 980 x^{\frac{3}{5}} - 10290 x^{\frac{2}{5}} - 48020 x^{\frac{1}{5}} - 84035 + \frac{3430 {(x^{\frac{1}{5}} + 7)}^{3}}{7} - 70 {(7 (x^{\frac{1}{5}} + 7))}^{2} + 1715 (7 (x^{\frac{1}{5}} + 7)) - 16807$

解题步骤 5.2.3.16

从 $3430 {(x^{\frac{1}{5}} + 7)}^{3}$ 中分解出因数 $7$ 。

$f^{- 1} (7 (x^{\frac{1}{5}} + 7)) = x + 35 x^{\frac{4}{5}} + 490 x^{\frac{3}{5}} + 3430 x^{\frac{2}{5}} + 12005 x^{\frac{1}{5}} + 16807 - 35 x^{\frac{4}{5}} - 980 x^{\frac{3}{5}} - 10290 x^{\frac{2}{5}} - 48020 x^{\frac{1}{5}} - 84035 + \frac{7 (490 {(x^{\frac{1}{5}} + 7)}^{3})}{7} - 70 {(7 (x^{\frac{1}{5}} + 7))}^{2} + 1715 (7 (x^{\frac{1}{5}} + 7)) - 16807$

解题步骤 5.2.3.17

约去公因数。

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解题步骤 5.2.3.17.1

从 $7$ 中分解出因数 $7$ 。

$f^{- 1} (7 (x^{\frac{1}{5}} + 7)) = x + 35 x^{\frac{4}{5}} + 490 x^{\frac{3}{5}} + 3430 x^{\frac{2}{5}} + 12005 x^{\frac{1}{5}} + 16807 - 35 x^{\frac{4}{5}} - 980 x^{\frac{3}{5}} - 10290 x^{\frac{2}{5}} - 48020 x^{\frac{1}{5}} - 84035 + \frac{7 (490 {(x^{\frac{1}{5}} + 7)}^{3})}{7 (1)} - 70 {(7 (x^{\frac{1}{5}} + 7))}^{2} + 1715 (7 (x^{\frac{1}{5}} + 7)) - 16807$

解题步骤 5.2.3.17.2

约去公因数。

$f^{- 1} (7 (x^{\frac{1}{5}} + 7)) = x + 35 x^{\frac{4}{5}} + 490 x^{\frac{3}{5}} + 3430 x^{\frac{2}{5}} + 12005 x^{\frac{1}{5}} + 16807 - 35 x^{\frac{4}{5}} - 980 x^{\frac{3}{5}} - 10290 x^{\frac{2}{5}} - 48020 x^{\frac{1}{5}} - 84035 + \frac{7 (490 {(x^{\frac{1}{5}} + 7)}^{3})}{7 \cdot 1} - 70 {(7 (x^{\frac{1}{5}} + 7))}^{2} + 1715 (7 (x^{\frac{1}{5}} + 7)) - 16807$

解题步骤 5.2.3.17.3

重写表达式。

$f^{- 1} (7 (x^{\frac{1}{5}} + 7)) = x + 35 x^{\frac{4}{5}} + 490 x^{\frac{3}{5}} + 3430 x^{\frac{2}{5}} + 12005 x^{\frac{1}{5}} + 16807 - 35 x^{\frac{4}{5}} - 980 x^{\frac{3}{5}} - 10290 x^{\frac{2}{5}} - 48020 x^{\frac{1}{5}} - 84035 + \frac{490 {(x^{\frac{1}{5}} + 7)}^{3}}{1} - 70 {(7 (x^{\frac{1}{5}} + 7))}^{2} + 1715 (7 (x^{\frac{1}{5}} + 7)) - 16807$

解题步骤 5.2.3.17.4

用 $490 {(x^{\frac{1}{5}} + 7)}^{3}$ 除以 $1$ 。

$f^{- 1} (7 (x^{\frac{1}{5}} + 7)) = x + 35 x^{\frac{4}{5}} + 490 x^{\frac{3}{5}} + 3430 x^{\frac{2}{5}} + 12005 x^{\frac{1}{5}} + 16807 - 35 x^{\frac{4}{5}} - 980 x^{\frac{3}{5}} - 10290 x^{\frac{2}{5}} - 48020 x^{\frac{1}{5}} - 84035 + 490 {(x^{\frac{1}{5}} + 7)}^{3} - 70 {(7 (x^{\frac{1}{5}} + 7))}^{2} + 1715 (7 (x^{\frac{1}{5}} + 7)) - 16807$

解题步骤 5.2.3.18

使用二项式定理。

$f^{- 1} (7 (x^{\frac{1}{5}} + 7)) = x + 35 x^{\frac{4}{5}} + 490 x^{\frac{3}{5}} + 3430 x^{\frac{2}{5}} + 12005 x^{\frac{1}{5}} + 16807 - 35 x^{\frac{4}{5}} - 980 x^{\frac{3}{5}} - 10290 x^{\frac{2}{5}} - 48020 x^{\frac{1}{5}} - 84035 + 490 ({(x^{\frac{1}{5}})}^{3} + 3 {(x^{\frac{1}{5}})}^{2} \cdot 7 + 3 x^{\frac{1}{5}} \cdot 7^{2} + 7^{3}) - 70 {(7 (x^{\frac{1}{5}} + 7))}^{2} + 1715 (7 (x^{\frac{1}{5}} + 7)) - 16807$

解题步骤 5.2.3.19

化简每一项。

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解题步骤 5.2.3.19.1

将 ${(x^{\frac{1}{5}})}^{3}$ 中的指数相乘。

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解题步骤 5.2.3.19.1.1

运用幂法则并将指数相乘， ${(a^{m})}^{n} = a^{m n}$ 。

$f^{- 1} (7 (x^{\frac{1}{5}} + 7)) = x + 35 x^{\frac{4}{5}} + 490 x^{\frac{3}{5}} + 3430 x^{\frac{2}{5}} + 12005 x^{\frac{1}{5}} + 16807 - 35 x^{\frac{4}{5}} - 980 x^{\frac{3}{5}} - 10290 x^{\frac{2}{5}} - 48020 x^{\frac{1}{5}} - 84035 + 490 (x^{\frac{1}{5} \cdot 3} + 3 {(x^{\frac{1}{5}})}^{2} \cdot 7 + 3 x^{\frac{1}{5}} \cdot 7^{2} + 7^{3}) - 70 {(7 (x^{\frac{1}{5}} + 7))}^{2} + 1715 (7 (x^{\frac{1}{5}} + 7)) - 16807$

解题步骤 5.2.3.19.1.2

组合 $\frac{1}{5}$ 和 $3$ 。

$f^{- 1} (7 (x^{\frac{1}{5}} + 7)) = x + 35 x^{\frac{4}{5}} + 490 x^{\frac{3}{5}} + 3430 x^{\frac{2}{5}} + 12005 x^{\frac{1}{5}} + 16807 - 35 x^{\frac{4}{5}} - 980 x^{\frac{3}{5}} - 10290 x^{\frac{2}{5}} - 48020 x^{\frac{1}{5}} - 84035 + 490 (x^{\frac{3}{5}} + 3 {(x^{\frac{1}{5}})}^{2} \cdot 7 + 3 x^{\frac{1}{5}} \cdot 7^{2} + 7^{3}) - 70 {(7 (x^{\frac{1}{5}} + 7))}^{2} + 1715 (7 (x^{\frac{1}{5}} + 7)) - 16807$

解题步骤 5.2.3.19.2

将 ${(x^{\frac{1}{5}})}^{2}$ 中的指数相乘。

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解题步骤 5.2.3.19.2.1

运用幂法则并将指数相乘， ${(a^{m})}^{n} = a^{m n}$ 。

$f^{- 1} (7 (x^{\frac{1}{5}} + 7)) = x + 35 x^{\frac{4}{5}} + 490 x^{\frac{3}{5}} + 3430 x^{\frac{2}{5}} + 12005 x^{\frac{1}{5}} + 16807 - 35 x^{\frac{4}{5}} - 980 x^{\frac{3}{5}} - 10290 x^{\frac{2}{5}} - 48020 x^{\frac{1}{5}} - 84035 + 490 (x^{\frac{3}{5}} + 3 x^{\frac{1}{5} \cdot 2} \cdot 7 + 3 x^{\frac{1}{5}} \cdot 7^{2} + 7^{3}) - 70 {(7 (x^{\frac{1}{5}} + 7))}^{2} + 1715 (7 (x^{\frac{1}{5}} + 7)) - 16807$

解题步骤 5.2.3.19.2.2

组合 $\frac{1}{5}$ 和 $2$ 。

$f^{- 1} (7 (x^{\frac{1}{5}} + 7)) = x + 35 x^{\frac{4}{5}} + 490 x^{\frac{3}{5}} + 3430 x^{\frac{2}{5}} + 12005 x^{\frac{1}{5}} + 16807 - 35 x^{\frac{4}{5}} - 980 x^{\frac{3}{5}} - 10290 x^{\frac{2}{5}} - 48020 x^{\frac{1}{5}} - 84035 + 490 (x^{\frac{3}{5}} + 3 x^{\frac{2}{5}} \cdot 7 + 3 x^{\frac{1}{5}} \cdot 7^{2} + 7^{3}) - 70 {(7 (x^{\frac{1}{5}} + 7))}^{2} + 1715 (7 (x^{\frac{1}{5}} + 7)) - 16807$

解题步骤 5.2.3.19.3

将 $7$ 乘以 $3$ 。

$f^{- 1} (7 (x^{\frac{1}{5}} + 7)) = x + 35 x^{\frac{4}{5}} + 490 x^{\frac{3}{5}} + 3430 x^{\frac{2}{5}} + 12005 x^{\frac{1}{5}} + 16807 - 35 x^{\frac{4}{5}} - 980 x^{\frac{3}{5}} - 10290 x^{\frac{2}{5}} - 48020 x^{\frac{1}{5}} - 84035 + 490 (x^{\frac{3}{5}} + 21 x^{\frac{2}{5}} + 3 x^{\frac{1}{5}} \cdot 7^{2} + 7^{3}) - 70 {(7 (x^{\frac{1}{5}} + 7))}^{2} + 1715 (7 (x^{\frac{1}{5}} + 7)) - 16807$

解题步骤 5.2.3.19.4

对 $7$ 进行 $2$ 次方运算。

$f^{- 1} (7 (x^{\frac{1}{5}} + 7)) = x + 35 x^{\frac{4}{5}} + 490 x^{\frac{3}{5}} + 3430 x^{\frac{2}{5}} + 12005 x^{\frac{1}{5}} + 16807 - 35 x^{\frac{4}{5}} - 980 x^{\frac{3}{5}} - 10290 x^{\frac{2}{5}} - 48020 x^{\frac{1}{5}} - 84035 + 490 (x^{\frac{3}{5}} + 21 x^{\frac{2}{5}} + 3 x^{\frac{1}{5}} \cdot 49 + 7^{3}) - 70 {(7 (x^{\frac{1}{5}} + 7))}^{2} + 1715 (7 (x^{\frac{1}{5}} + 7)) - 16807$

解题步骤 5.2.3.19.5

将 $49$ 乘以 $3$ 。

$f^{- 1} (7 (x^{\frac{1}{5}} + 7)) = x + 35 x^{\frac{4}{5}} + 490 x^{\frac{3}{5}} + 3430 x^{\frac{2}{5}} + 12005 x^{\frac{1}{5}} + 16807 - 35 x^{\frac{4}{5}} - 980 x^{\frac{3}{5}} - 10290 x^{\frac{2}{5}} - 48020 x^{\frac{1}{5}} - 84035 + 490 (x^{\frac{3}{5}} + 21 x^{\frac{2}{5}} + 147 x^{\frac{1}{5}} + 7^{3}) - 70 {(7 (x^{\frac{1}{5}} + 7))}^{2} + 1715 (7 (x^{\frac{1}{5}} + 7)) - 16807$

解题步骤 5.2.3.19.6

对 $7$ 进行 $3$ 次方运算。

$f^{- 1} (7 (x^{\frac{1}{5}} + 7)) = x + 35 x^{\frac{4}{5}} + 490 x^{\frac{3}{5}} + 3430 x^{\frac{2}{5}} + 12005 x^{\frac{1}{5}} + 16807 - 35 x^{\frac{4}{5}} - 980 x^{\frac{3}{5}} - 10290 x^{\frac{2}{5}} - 48020 x^{\frac{1}{5}} - 84035 + 490 (x^{\frac{3}{5}} + 21 x^{\frac{2}{5}} + 147 x^{\frac{1}{5}} + 343) - 70 {(7 (x^{\frac{1}{5}} + 7))}^{2} + 1715 (7 (x^{\frac{1}{5}} + 7)) - 16807$

解题步骤 5.2.3.20

运用分配律。

$f^{- 1} (7 (x^{\frac{1}{5}} + 7)) = x + 35 x^{\frac{4}{5}} + 490 x^{\frac{3}{5}} + 3430 x^{\frac{2}{5}} + 12005 x^{\frac{1}{5}} + 16807 - 35 x^{\frac{4}{5}} - 980 x^{\frac{3}{5}} - 10290 x^{\frac{2}{5}} - 48020 x^{\frac{1}{5}} - 84035 + 490 x^{\frac{3}{5}} + 490 (21 x^{\frac{2}{5}}) + 490 (147 x^{\frac{1}{5}}) + 490 \cdot 343 - 70 {(7 (x^{\frac{1}{5}} + 7))}^{2} + 1715 (7 (x^{\frac{1}{5}} + 7)) - 16807$

解题步骤 5.2.3.21

化简。

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解题步骤 5.2.3.21.1

将 $21$ 乘以 $490$ 。

$f^{- 1} (7 (x^{\frac{1}{5}} + 7)) = x + 35 x^{\frac{4}{5}} + 490 x^{\frac{3}{5}} + 3430 x^{\frac{2}{5}} + 12005 x^{\frac{1}{5}} + 16807 - 35 x^{\frac{4}{5}} - 980 x^{\frac{3}{5}} - 10290 x^{\frac{2}{5}} - 48020 x^{\frac{1}{5}} - 84035 + 490 x^{\frac{3}{5}} + 10290 x^{\frac{2}{5}} + 490 (147 x^{\frac{1}{5}}) + 490 \cdot 343 - 70 {(7 (x^{\frac{1}{5}} + 7))}^{2} + 1715 (7 (x^{\frac{1}{5}} + 7)) - 16807$

解题步骤 5.2.3.21.2

将 $147$ 乘以 $490$ 。

$f^{- 1} (7 (x^{\frac{1}{5}} + 7)) = x + 35 x^{\frac{4}{5}} + 490 x^{\frac{3}{5}} + 3430 x^{\frac{2}{5}} + 12005 x^{\frac{1}{5}} + 16807 - 35 x^{\frac{4}{5}} - 980 x^{\frac{3}{5}} - 10290 x^{\frac{2}{5}} - 48020 x^{\frac{1}{5}} - 84035 + 490 x^{\frac{3}{5}} + 10290 x^{\frac{2}{5}} + 72030 x^{\frac{1}{5}} + 490 \cdot 343 - 70 {(7 (x^{\frac{1}{5}} + 7))}^{2} + 1715 (7 (x^{\frac{1}{5}} + 7)) - 16807$

解题步骤 5.2.3.21.3

将 $490$ 乘以 $343$ 。

$f^{- 1} (7 (x^{\frac{1}{5}} + 7)) = x + 35 x^{\frac{4}{5}} + 490 x^{\frac{3}{5}} + 3430 x^{\frac{2}{5}} + 12005 x^{\frac{1}{5}} + 16807 - 35 x^{\frac{4}{5}} - 980 x^{\frac{3}{5}} - 10290 x^{\frac{2}{5}} - 48020 x^{\frac{1}{5}} - 84035 + 490 x^{\frac{3}{5}} + 10290 x^{\frac{2}{5}} + 72030 x^{\frac{1}{5}} + 168070 - 70 {(7 (x^{\frac{1}{5}} + 7))}^{2} + 1715 (7 (x^{\frac{1}{5}} + 7)) - 16807$

解题步骤 5.2.3.22

运用分配律。

$f^{- 1} (7 (x^{\frac{1}{5}} + 7)) = x + 35 x^{\frac{4}{5}} + 490 x^{\frac{3}{5}} + 3430 x^{\frac{2}{5}} + 12005 x^{\frac{1}{5}} + 16807 - 35 x^{\frac{4}{5}} - 980 x^{\frac{3}{5}} - 10290 x^{\frac{2}{5}} - 48020 x^{\frac{1}{5}} - 84035 + 490 x^{\frac{3}{5}} + 10290 x^{\frac{2}{5}} + 72030 x^{\frac{1}{5}} + 168070 - 70 {(7 x^{\frac{1}{5}} + 7 \cdot 7)}^{2} + 1715 (7 (x^{\frac{1}{5}} + 7)) - 16807$

解题步骤 5.2.3.23

将 $7$ 乘以 $7$ 。

$f^{- 1} (7 (x^{\frac{1}{5}} + 7)) = x + 35 x^{\frac{4}{5}} + 490 x^{\frac{3}{5}} + 3430 x^{\frac{2}{5}} + 12005 x^{\frac{1}{5}} + 16807 - 35 x^{\frac{4}{5}} - 980 x^{\frac{3}{5}} - 10290 x^{\frac{2}{5}} - 48020 x^{\frac{1}{5}} - 84035 + 490 x^{\frac{3}{5}} + 10290 x^{\frac{2}{5}} + 72030 x^{\frac{1}{5}} + 168070 - 70 {(7 x^{\frac{1}{5}} + 49)}^{2} + 1715 (7 (x^{\frac{1}{5}} + 7)) - 16807$

解题步骤 5.2.3.24

将 ${(7 x^{\frac{1}{5}} + 49)}^{2}$ 重写为 $(7 x^{\frac{1}{5}} + 49) (7 x^{\frac{1}{5}} + 49)$ 。

$f^{- 1} (7 (x^{\frac{1}{5}} + 7)) = x + 35 x^{\frac{4}{5}} + 490 x^{\frac{3}{5}} + 3430 x^{\frac{2}{5}} + 12005 x^{\frac{1}{5}} + 16807 - 35 x^{\frac{4}{5}} - 980 x^{\frac{3}{5}} - 10290 x^{\frac{2}{5}} - 48020 x^{\frac{1}{5}} - 84035 + 490 x^{\frac{3}{5}} + 10290 x^{\frac{2}{5}} + 72030 x^{\frac{1}{5}} + 168070 - 70 ((7 x^{\frac{1}{5}} + 49) (7 x^{\frac{1}{5}} + 49)) + 1715 (7 (x^{\frac{1}{5}} + 7)) - 16807$

解题步骤 5.2.3.25

使用 FOIL 方法展开 $(7 x^{\frac{1}{5}} + 49) (7 x^{\frac{1}{5}} + 49)$ 。

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解题步骤 5.2.3.25.1

运用分配律。

$f^{- 1} (7 (x^{\frac{1}{5}} + 7)) = x + 35 x^{\frac{4}{5}} + 490 x^{\frac{3}{5}} + 3430 x^{\frac{2}{5}} + 12005 x^{\frac{1}{5}} + 16807 - 35 x^{\frac{4}{5}} - 980 x^{\frac{3}{5}} - 10290 x^{\frac{2}{5}} - 48020 x^{\frac{1}{5}} - 84035 + 490 x^{\frac{3}{5}} + 10290 x^{\frac{2}{5}} + 72030 x^{\frac{1}{5}} + 168070 - 70 (7 x^{\frac{1}{5}} (7 x^{\frac{1}{5}} + 49) + 49 (7 x^{\frac{1}{5}} + 49)) + 1715 (7 (x^{\frac{1}{5}} + 7)) - 16807$

解题步骤 5.2.3.25.2

运用分配律。

$f^{- 1} (7 (x^{\frac{1}{5}} + 7)) = x + 35 x^{\frac{4}{5}} + 490 x^{\frac{3}{5}} + 3430 x^{\frac{2}{5}} + 12005 x^{\frac{1}{5}} + 16807 - 35 x^{\frac{4}{5}} - 980 x^{\frac{3}{5}} - 10290 x^{\frac{2}{5}} - 48020 x^{\frac{1}{5}} - 84035 + 490 x^{\frac{3}{5}} + 10290 x^{\frac{2}{5}} + 72030 x^{\frac{1}{5}} + 168070 - 70 (7 x^{\frac{1}{5}} (7 x^{\frac{1}{5}}) + 7 x^{\frac{1}{5}} \cdot 49 + 49 (7 x^{\frac{1}{5}} + 49)) + 1715 (7 (x^{\frac{1}{5}} + 7)) - 16807$

解题步骤 5.2.3.25.3

运用分配律。

$f^{- 1} (7 (x^{\frac{1}{5}} + 7)) = x + 35 x^{\frac{4}{5}} + 490 x^{\frac{3}{5}} + 3430 x^{\frac{2}{5}} + 12005 x^{\frac{1}{5}} + 16807 - 35 x^{\frac{4}{5}} - 980 x^{\frac{3}{5}} - 10290 x^{\frac{2}{5}} - 48020 x^{\frac{1}{5}} - 84035 + 490 x^{\frac{3}{5}} + 10290 x^{\frac{2}{5}} + 72030 x^{\frac{1}{5}} + 168070 - 70 (7 x^{\frac{1}{5}} (7 x^{\frac{1}{5}}) + 7 x^{\frac{1}{5}} \cdot 49 + 49 (7 x^{\frac{1}{5}}) + 49 \cdot 49) + 1715 (7 (x^{\frac{1}{5}} + 7)) - 16807$

解题步骤 5.2.3.26

化简并合并同类项。

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解题步骤 5.2.3.26.1

化简每一项。

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解题步骤 5.2.3.26.1.1

使用乘法的交换性质重写。

$f^{- 1} (7 (x^{\frac{1}{5}} + 7)) = x + 35 x^{\frac{4}{5}} + 490 x^{\frac{3}{5}} + 3430 x^{\frac{2}{5}} + 12005 x^{\frac{1}{5}} + 16807 - 35 x^{\frac{4}{5}} - 980 x^{\frac{3}{5}} - 10290 x^{\frac{2}{5}} - 48020 x^{\frac{1}{5}} - 84035 + 490 x^{\frac{3}{5}} + 10290 x^{\frac{2}{5}} + 72030 x^{\frac{1}{5}} + 168070 - 70 (7 \cdot (7 x^{\frac{1}{5}} x^{\frac{1}{5}}) + 7 x^{\frac{1}{5}} \cdot 49 + 49 (7 x^{\frac{1}{5}}) + 49 \cdot 49) + 1715 (7 (x^{\frac{1}{5}} + 7)) - 16807$

解题步骤 5.2.3.26.1.2

通过指数相加将 $x^{\frac{1}{5}}$ 乘以 $x^{\frac{1}{5}}$ 。

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解题步骤 5.2.3.26.1.2.1

移动 $x^{\frac{1}{5}}$ 。

$f^{- 1} (7 (x^{\frac{1}{5}} + 7)) = x + 35 x^{\frac{4}{5}} + 490 x^{\frac{3}{5}} + 3430 x^{\frac{2}{5}} + 12005 x^{\frac{1}{5}} + 16807 - 35 x^{\frac{4}{5}} - 980 x^{\frac{3}{5}} - 10290 x^{\frac{2}{5}} - 48020 x^{\frac{1}{5}} - 84035 + 490 x^{\frac{3}{5}} + 10290 x^{\frac{2}{5}} + 72030 x^{\frac{1}{5}} + 168070 - 70 (7 \cdot (7 (x^{\frac{1}{5}} x^{\frac{1}{5}})) + 7 x^{\frac{1}{5}} \cdot 49 + 49 (7 x^{\frac{1}{5}}) + 49 \cdot 49) + 1715 (7 (x^{\frac{1}{5}} + 7)) - 16807$

解题步骤 5.2.3.26.1.2.2

使用幂法则 $a^{m} a^{n} = a^{m + n}$ 合并指数。

$f^{- 1} (7 (x^{\frac{1}{5}} + 7)) = x + 35 x^{\frac{4}{5}} + 490 x^{\frac{3}{5}} + 3430 x^{\frac{2}{5}} + 12005 x^{\frac{1}{5}} + 16807 - 35 x^{\frac{4}{5}} - 980 x^{\frac{3}{5}} - 10290 x^{\frac{2}{5}} - 48020 x^{\frac{1}{5}} - 84035 + 490 x^{\frac{3}{5}} + 10290 x^{\frac{2}{5}} + 72030 x^{\frac{1}{5}} + 168070 - 70 (7 \cdot (7 x^{\frac{1}{5} + \frac{1}{5}}) + 7 x^{\frac{1}{5}} \cdot 49 + 49 (7 x^{\frac{1}{5}}) + 49 \cdot 49) + 1715 (7 (x^{\frac{1}{5}} + 7)) - 16807$

解题步骤 5.2.3.26.1.2.3

在公分母上合并分子。

$f^{- 1} (7 (x^{\frac{1}{5}} + 7)) = x + 35 x^{\frac{4}{5}} + 490 x^{\frac{3}{5}} + 3430 x^{\frac{2}{5}} + 12005 x^{\frac{1}{5}} + 16807 - 35 x^{\frac{4}{5}} - 980 x^{\frac{3}{5}} - 10290 x^{\frac{2}{5}} - 48020 x^{\frac{1}{5}} - 84035 + 490 x^{\frac{3}{5}} + 10290 x^{\frac{2}{5}} + 72030 x^{\frac{1}{5}} + 168070 - 70 (7 \cdot (7 x^{\frac{1 + 1}{5}}) + 7 x^{\frac{1}{5}} \cdot 49 + 49 (7 x^{\frac{1}{5}}) + 49 \cdot 49) + 1715 (7 (x^{\frac{1}{5}} + 7)) - 16807$

解题步骤 5.2.3.26.1.2.4

将 $1$ 和 $1$ 相加。

$f^{- 1} (7 (x^{\frac{1}{5}} + 7)) = x + 35 x^{\frac{4}{5}} + 490 x^{\frac{3}{5}} + 3430 x^{\frac{2}{5}} + 12005 x^{\frac{1}{5}} + 16807 - 35 x^{\frac{4}{5}} - 980 x^{\frac{3}{5}} - 10290 x^{\frac{2}{5}} - 48020 x^{\frac{1}{5}} - 84035 + 490 x^{\frac{3}{5}} + 10290 x^{\frac{2}{5}} + 72030 x^{\frac{1}{5}} + 168070 - 70 (7 \cdot (7 x^{\frac{2}{5}}) + 7 x^{\frac{1}{5}} \cdot 49 + 49 (7 x^{\frac{1}{5}}) + 49 \cdot 49) + 1715 (7 (x^{\frac{1}{5}} + 7)) - 16807$

解题步骤 5.2.3.26.1.3

将 $7$ 乘以 $7$ 。

$f^{- 1} (7 (x^{\frac{1}{5}} + 7)) = x + 35 x^{\frac{4}{5}} + 490 x^{\frac{3}{5}} + 3430 x^{\frac{2}{5}} + 12005 x^{\frac{1}{5}} + 16807 - 35 x^{\frac{4}{5}} - 980 x^{\frac{3}{5}} - 10290 x^{\frac{2}{5}} - 48020 x^{\frac{1}{5}} - 84035 + 490 x^{\frac{3}{5}} + 10290 x^{\frac{2}{5}} + 72030 x^{\frac{1}{5}} + 168070 - 70 (49 x^{\frac{2}{5}} + 7 x^{\frac{1}{5}} \cdot 49 + 49 (7 x^{\frac{1}{5}}) + 49 \cdot 49) + 1715 (7 (x^{\frac{1}{5}} + 7)) - 16807$

解题步骤 5.2.3.26.1.4

将 $49$ 乘以 $7$ 。

$f^{- 1} (7 (x^{\frac{1}{5}} + 7)) = x + 35 x^{\frac{4}{5}} + 490 x^{\frac{3}{5}} + 3430 x^{\frac{2}{5}} + 12005 x^{\frac{1}{5}} + 16807 - 35 x^{\frac{4}{5}} - 980 x^{\frac{3}{5}} - 10290 x^{\frac{2}{5}} - 48020 x^{\frac{1}{5}} - 84035 + 490 x^{\frac{3}{5}} + 10290 x^{\frac{2}{5}} + 72030 x^{\frac{1}{5}} + 168070 - 70 (49 x^{\frac{2}{5}} + 343 x^{\frac{1}{5}} + 49 (7 x^{\frac{1}{5}}) + 49 \cdot 49) + 1715 (7 (x^{\frac{1}{5}} + 7)) - 16807$

解题步骤 5.2.3.26.1.5

将 $7$ 乘以 $49$ 。

$f^{- 1} (7 (x^{\frac{1}{5}} + 7)) = x + 35 x^{\frac{4}{5}} + 490 x^{\frac{3}{5}} + 3430 x^{\frac{2}{5}} + 12005 x^{\frac{1}{5}} + 16807 - 35 x^{\frac{4}{5}} - 980 x^{\frac{3}{5}} - 10290 x^{\frac{2}{5}} - 48020 x^{\frac{1}{5}} - 84035 + 490 x^{\frac{3}{5}} + 10290 x^{\frac{2}{5}} + 72030 x^{\frac{1}{5}} + 168070 - 70 (49 x^{\frac{2}{5}} + 343 x^{\frac{1}{5}} + 343 x^{\frac{1}{5}} + 49 \cdot 49) + 1715 (7 (x^{\frac{1}{5}} + 7)) - 16807$

解题步骤 5.2.3.26.1.6

将 $49$ 乘以 $49$ 。

$f^{- 1} (7 (x^{\frac{1}{5}} + 7)) = x + 35 x^{\frac{4}{5}} + 490 x^{\frac{3}{5}} + 3430 x^{\frac{2}{5}} + 12005 x^{\frac{1}{5}} + 16807 - 35 x^{\frac{4}{5}} - 980 x^{\frac{3}{5}} - 10290 x^{\frac{2}{5}} - 48020 x^{\frac{1}{5}} - 84035 + 490 x^{\frac{3}{5}} + 10290 x^{\frac{2}{5}} + 72030 x^{\frac{1}{5}} + 168070 - 70 (49 x^{\frac{2}{5}} + 343 x^{\frac{1}{5}} + 343 x^{\frac{1}{5}} + 2401) + 1715 (7 (x^{\frac{1}{5}} + 7)) - 16807$

解题步骤 5.2.3.26.2

将 $343 x^{\frac{1}{5}}$ 和 $343 x^{\frac{1}{5}}$ 相加。

$f^{- 1} (7 (x^{\frac{1}{5}} + 7)) = x + 35 x^{\frac{4}{5}} + 490 x^{\frac{3}{5}} + 3430 x^{\frac{2}{5}} + 12005 x^{\frac{1}{5}} + 16807 - 35 x^{\frac{4}{5}} - 980 x^{\frac{3}{5}} - 10290 x^{\frac{2}{5}} - 48020 x^{\frac{1}{5}} - 84035 + 490 x^{\frac{3}{5}} + 10290 x^{\frac{2}{5}} + 72030 x^{\frac{1}{5}} + 168070 - 70 (49 x^{\frac{2}{5}} + 686 x^{\frac{1}{5}} + 2401) + 1715 (7 (x^{\frac{1}{5}} + 7)) - 16807$

解题步骤 5.2.3.27

运用分配律。

$f^{- 1} (7 (x^{\frac{1}{5}} + 7)) = x + 35 x^{\frac{4}{5}} + 490 x^{\frac{3}{5}} + 3430 x^{\frac{2}{5}} + 12005 x^{\frac{1}{5}} + 16807 - 35 x^{\frac{4}{5}} - 980 x^{\frac{3}{5}} - 10290 x^{\frac{2}{5}} - 48020 x^{\frac{1}{5}} - 84035 + 490 x^{\frac{3}{5}} + 10290 x^{\frac{2}{5}} + 72030 x^{\frac{1}{5}} + 168070 - 70 (49 x^{\frac{2}{5}}) - 70 (686 x^{\frac{1}{5}}) - 70 \cdot 2401 + 1715 (7 (x^{\frac{1}{5}} + 7)) - 16807$

解题步骤 5.2.3.28

化简。

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解题步骤 5.2.3.28.1

将 $49$ 乘以 $- 70$ 。

$f^{- 1} (7 (x^{\frac{1}{5}} + 7)) = x + 35 x^{\frac{4}{5}} + 490 x^{\frac{3}{5}} + 3430 x^{\frac{2}{5}} + 12005 x^{\frac{1}{5}} + 16807 - 35 x^{\frac{4}{5}} - 980 x^{\frac{3}{5}} - 10290 x^{\frac{2}{5}} - 48020 x^{\frac{1}{5}} - 84035 + 490 x^{\frac{3}{5}} + 10290 x^{\frac{2}{5}} + 72030 x^{\frac{1}{5}} + 168070 - 3430 x^{\frac{2}{5}} - 70 (686 x^{\frac{1}{5}}) - 70 \cdot 2401 + 1715 (7 (x^{\frac{1}{5}} + 7)) - 16807$

解题步骤 5.2.3.28.2

将 $686$ 乘以 $- 70$ 。

$f^{- 1} (7 (x^{\frac{1}{5}} + 7)) = x + 35 x^{\frac{4}{5}} + 490 x^{\frac{3}{5}} + 3430 x^{\frac{2}{5}} + 12005 x^{\frac{1}{5}} + 16807 - 35 x^{\frac{4}{5}} - 980 x^{\frac{3}{5}} - 10290 x^{\frac{2}{5}} - 48020 x^{\frac{1}{5}} - 84035 + 490 x^{\frac{3}{5}} + 10290 x^{\frac{2}{5}} + 72030 x^{\frac{1}{5}} + 168070 - 3430 x^{\frac{2}{5}} - 48020 x^{\frac{1}{5}} - 70 \cdot 2401 + 1715 (7 (x^{\frac{1}{5}} + 7)) - 16807$

解题步骤 5.2.3.28.3

将 $- 70$ 乘以 $2401$ 。

$f^{- 1} (7 (x^{\frac{1}{5}} + 7)) = x + 35 x^{\frac{4}{5}} + 490 x^{\frac{3}{5}} + 3430 x^{\frac{2}{5}} + 12005 x^{\frac{1}{5}} + 16807 - 35 x^{\frac{4}{5}} - 980 x^{\frac{3}{5}} - 10290 x^{\frac{2}{5}} - 48020 x^{\frac{1}{5}} - 84035 + 490 x^{\frac{3}{5}} + 10290 x^{\frac{2}{5}} + 72030 x^{\frac{1}{5}} + 168070 - 3430 x^{\frac{2}{5}} - 48020 x^{\frac{1}{5}} - 168070 + 1715 (7 (x^{\frac{1}{5}} + 7)) - 16807$

解题步骤 5.2.3.29

运用分配律。

$f^{- 1} (7 (x^{\frac{1}{5}} + 7)) = x + 35 x^{\frac{4}{5}} + 490 x^{\frac{3}{5}} + 3430 x^{\frac{2}{5}} + 12005 x^{\frac{1}{5}} + 16807 - 35 x^{\frac{4}{5}} - 980 x^{\frac{3}{5}} - 10290 x^{\frac{2}{5}} - 48020 x^{\frac{1}{5}} - 84035 + 490 x^{\frac{3}{5}} + 10290 x^{\frac{2}{5}} + 72030 x^{\frac{1}{5}} + 168070 - 3430 x^{\frac{2}{5}} - 48020 x^{\frac{1}{5}} - 168070 + 1715 (7 x^{\frac{1}{5}} + 7 \cdot 7) - 16807$

解题步骤 5.2.3.30

将 $7$ 乘以 $7$ 。

$f^{- 1} (7 (x^{\frac{1}{5}} + 7)) = x + 35 x^{\frac{4}{5}} + 490 x^{\frac{3}{5}} + 3430 x^{\frac{2}{5}} + 12005 x^{\frac{1}{5}} + 16807 - 35 x^{\frac{4}{5}} - 980 x^{\frac{3}{5}} - 10290 x^{\frac{2}{5}} - 48020 x^{\frac{1}{5}} - 84035 + 490 x^{\frac{3}{5}} + 10290 x^{\frac{2}{5}} + 72030 x^{\frac{1}{5}} + 168070 - 3430 x^{\frac{2}{5}} - 48020 x^{\frac{1}{5}} - 168070 + 1715 (7 x^{\frac{1}{5}} + 49) - 16807$

解题步骤 5.2.3.31

运用分配律。

$f^{- 1} (7 (x^{\frac{1}{5}} + 7)) = x + 35 x^{\frac{4}{5}} + 490 x^{\frac{3}{5}} + 3430 x^{\frac{2}{5}} + 12005 x^{\frac{1}{5}} + 16807 - 35 x^{\frac{4}{5}} - 980 x^{\frac{3}{5}} - 10290 x^{\frac{2}{5}} - 48020 x^{\frac{1}{5}} - 84035 + 490 x^{\frac{3}{5}} + 10290 x^{\frac{2}{5}} + 72030 x^{\frac{1}{5}} + 168070 - 3430 x^{\frac{2}{5}} - 48020 x^{\frac{1}{5}} - 168070 + 1715 (7 x^{\frac{1}{5}}) + 1715 \cdot 49 - 16807$

解题步骤 5.2.3.32

将 $7$ 乘以 $1715$ 。

$f^{- 1} (7 (x^{\frac{1}{5}} + 7)) = x + 35 x^{\frac{4}{5}} + 490 x^{\frac{3}{5}} + 3430 x^{\frac{2}{5}} + 12005 x^{\frac{1}{5}} + 16807 - 35 x^{\frac{4}{5}} - 980 x^{\frac{3}{5}} - 10290 x^{\frac{2}{5}} - 48020 x^{\frac{1}{5}} - 84035 + 490 x^{\frac{3}{5}} + 10290 x^{\frac{2}{5}} + 72030 x^{\frac{1}{5}} + 168070 - 3430 x^{\frac{2}{5}} - 48020 x^{\frac{1}{5}} - 168070 + 12005 x^{\frac{1}{5}} + 1715 \cdot 49 - 16807$

解题步骤 5.2.3.33

将 $1715$ 乘以 $49$ 。

$f^{- 1} (7 (x^{\frac{1}{5}} + 7)) = x + 35 x^{\frac{4}{5}} + 490 x^{\frac{3}{5}} + 3430 x^{\frac{2}{5}} + 12005 x^{\frac{1}{5}} + 16807 - 35 x^{\frac{4}{5}} - 980 x^{\frac{3}{5}} - 10290 x^{\frac{2}{5}} - 48020 x^{\frac{1}{5}} - 84035 + 490 x^{\frac{3}{5}} + 10290 x^{\frac{2}{5}} + 72030 x^{\frac{1}{5}} + 168070 - 3430 x^{\frac{2}{5}} - 48020 x^{\frac{1}{5}} - 168070 + 12005 x^{\frac{1}{5}} + 84035 - 16807$

解题步骤 5.2.4

通过加上各项进行化简。

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解题步骤 5.2.4.1

合并 $x + 35 x^{\frac{4}{5}} + 490 x^{\frac{3}{5}} + 3430 x^{\frac{2}{5}} + 12005 x^{\frac{1}{5}} + 16807 - 35 x^{\frac{4}{5}} - 980 x^{\frac{3}{5}} - 10290 x^{\frac{2}{5}} - 48020 x^{\frac{1}{5}} - 84035 + 490 x^{\frac{3}{5}} + 10290 x^{\frac{2}{5}} + 72030 x^{\frac{1}{5}} + 168070 - 3430 x^{\frac{2}{5}} - 48020 x^{\frac{1}{5}} - 168070 + 12005 x^{\frac{1}{5}} + 84035 - 16807$ 中相反的项。

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解题步骤 5.2.4.1.1

从 $35 x^{\frac{4}{5}}$ 中减去 $35 x^{\frac{4}{5}}$ 。

$f^{- 1} (7 (x^{\frac{1}{5}} + 7)) = x + 490 x^{\frac{3}{5}} + 3430 x^{\frac{2}{5}} + 12005 x^{\frac{1}{5}} + 16807 + 0 - 980 x^{\frac{3}{5}} - 10290 x^{\frac{2}{5}} - 48020 x^{\frac{1}{5}} - 84035 + 490 x^{\frac{3}{5}} + 10290 x^{\frac{2}{5}} + 72030 x^{\frac{1}{5}} + 168070 - 3430 x^{\frac{2}{5}} - 48020 x^{\frac{1}{5}} - 168070 + 12005 x^{\frac{1}{5}} + 84035 - 16807$

解题步骤 5.2.4.1.2

将 $x + 490 x^{\frac{3}{5}} + 3430 x^{\frac{2}{5}} + 12005 x^{\frac{1}{5}} + 16807$ 和 $0$ 相加。

$f^{- 1} (7 (x^{\frac{1}{5}} + 7)) = x + 490 x^{\frac{3}{5}} + 3430 x^{\frac{2}{5}} + 12005 x^{\frac{1}{5}} + 16807 - 980 x^{\frac{3}{5}} - 10290 x^{\frac{2}{5}} - 48020 x^{\frac{1}{5}} - 84035 + 490 x^{\frac{3}{5}} + 10290 x^{\frac{2}{5}} + 72030 x^{\frac{1}{5}} + 168070 - 3430 x^{\frac{2}{5}} - 48020 x^{\frac{1}{5}} - 168070 + 12005 x^{\frac{1}{5}} + 84035 - 16807$

解题步骤 5.2.4.1.3

将 $- 10290 x^{\frac{2}{5}}$ 和 $10290 x^{\frac{2}{5}}$ 相加。

$f^{- 1} (7 (x^{\frac{1}{5}} + 7)) = x + 490 x^{\frac{3}{5}} + 3430 x^{\frac{2}{5}} + 12005 x^{\frac{1}{5}} + 16807 - 980 x^{\frac{3}{5}} - 48020 x^{\frac{1}{5}} - 84035 + 490 x^{\frac{3}{5}} + 0 + 72030 x^{\frac{1}{5}} + 168070 - 3430 x^{\frac{2}{5}} - 48020 x^{\frac{1}{5}} - 168070 + 12005 x^{\frac{1}{5}} + 84035 - 16807$

解题步骤 5.2.4.1.4

将 $x + 490 x^{\frac{3}{5}} + 3430 x^{\frac{2}{5}} + 12005 x^{\frac{1}{5}} + 16807 - 980 x^{\frac{3}{5}} - 48020 x^{\frac{1}{5}} - 84035 + 490 x^{\frac{3}{5}}$ 和 $0$ 相加。

$f^{- 1} (7 (x^{\frac{1}{5}} + 7)) = x + 490 x^{\frac{3}{5}} + 3430 x^{\frac{2}{5}} + 12005 x^{\frac{1}{5}} + 16807 - 980 x^{\frac{3}{5}} - 48020 x^{\frac{1}{5}} - 84035 + 490 x^{\frac{3}{5}} + 72030 x^{\frac{1}{5}} + 168070 - 3430 x^{\frac{2}{5}} - 48020 x^{\frac{1}{5}} - 168070 + 12005 x^{\frac{1}{5}} + 84035 - 16807$

解题步骤 5.2.4.1.5

从 $3430 x^{\frac{2}{5}}$ 中减去 $3430 x^{\frac{2}{5}}$ 。

$f^{- 1} (7 (x^{\frac{1}{5}} + 7)) = x + 490 x^{\frac{3}{5}} + 12005 x^{\frac{1}{5}} + 16807 - 980 x^{\frac{3}{5}} - 48020 x^{\frac{1}{5}} - 84035 + 490 x^{\frac{3}{5}} + 72030 x^{\frac{1}{5}} + 168070 + 0 - 48020 x^{\frac{1}{5}} - 168070 + 12005 x^{\frac{1}{5}} + 84035 - 16807$

解题步骤 5.2.4.1.6

将 $x + 490 x^{\frac{3}{5}} + 12005 x^{\frac{1}{5}} + 16807 - 980 x^{\frac{3}{5}} - 48020 x^{\frac{1}{5}} - 84035 + 490 x^{\frac{3}{5}} + 72030 x^{\frac{1}{5}} + 168070$ 和 $0$ 相加。

$f^{- 1} (7 (x^{\frac{1}{5}} + 7)) = x + 490 x^{\frac{3}{5}} + 12005 x^{\frac{1}{5}} + 16807 - 980 x^{\frac{3}{5}} - 48020 x^{\frac{1}{5}} - 84035 + 490 x^{\frac{3}{5}} + 72030 x^{\frac{1}{5}} + 168070 - 48020 x^{\frac{1}{5}} - 168070 + 12005 x^{\frac{1}{5}} + 84035 - 16807$

解题步骤 5.2.4.1.7

从 $168070$ 中减去 $168070$ 。

$f^{- 1} (7 (x^{\frac{1}{5}} + 7)) = x + 490 x^{\frac{3}{5}} + 12005 x^{\frac{1}{5}} + 16807 - 980 x^{\frac{3}{5}} - 48020 x^{\frac{1}{5}} - 84035 + 490 x^{\frac{3}{5}} + 72030 x^{\frac{1}{5}} - 48020 x^{\frac{1}{5}} + 0 + 12005 x^{\frac{1}{5}} + 84035 - 16807$

解题步骤 5.2.4.1.8

将 $x + 490 x^{\frac{3}{5}} + 12005 x^{\frac{1}{5}} + 16807 - 980 x^{\frac{3}{5}} - 48020 x^{\frac{1}{5}} - 84035 + 490 x^{\frac{3}{5}} + 72030 x^{\frac{1}{5}} - 48020 x^{\frac{1}{5}}$ 和 $0$ 相加。

$f^{- 1} (7 (x^{\frac{1}{5}} + 7)) = x + 490 x^{\frac{3}{5}} + 12005 x^{\frac{1}{5}} + 16807 - 980 x^{\frac{3}{5}} - 48020 x^{\frac{1}{5}} - 84035 + 490 x^{\frac{3}{5}} + 72030 x^{\frac{1}{5}} - 48020 x^{\frac{1}{5}} + 12005 x^{\frac{1}{5}} + 84035 - 16807$

解题步骤 5.2.4.1.9

将 $- 84035$ 和 $84035$ 相加。

$f^{- 1} (7 (x^{\frac{1}{5}} + 7)) = x + 490 x^{\frac{3}{5}} + 12005 x^{\frac{1}{5}} + 16807 - 980 x^{\frac{3}{5}} - 48020 x^{\frac{1}{5}} + 490 x^{\frac{3}{5}} + 72030 x^{\frac{1}{5}} - 48020 x^{\frac{1}{5}} + 12005 x^{\frac{1}{5}} + 0 - 16807$

解题步骤 5.2.4.1.10

将 $x + 490 x^{\frac{3}{5}} + 12005 x^{\frac{1}{5}} + 16807 - 980 x^{\frac{3}{5}} - 48020 x^{\frac{1}{5}} + 490 x^{\frac{3}{5}} + 72030 x^{\frac{1}{5}} - 48020 x^{\frac{1}{5}} + 12005 x^{\frac{1}{5}}$ 和 $0$ 相加。

解题步骤 5.2.4.1.11

从 $16807$ 中减去 $16807$ 。

$f^{- 1} (7 (x^{\frac{1}{5}} + 7)) = x + 490 x^{\frac{3}{5}} + 12005 x^{\frac{1}{5}} - 980 x^{\frac{3}{5}} - 48020 x^{\frac{1}{5}} + 490 x^{\frac{3}{5}} + 72030 x^{\frac{1}{5}} - 48020 x^{\frac{1}{5}} + 12005 x^{\frac{1}{5}} + 0$

解题步骤 5.2.4.1.12

将 $x + 490 x^{\frac{3}{5}} + 12005 x^{\frac{1}{5}} - 980 x^{\frac{3}{5}} - 48020 x^{\frac{1}{5}} + 490 x^{\frac{3}{5}} + 72030 x^{\frac{1}{5}} - 48020 x^{\frac{1}{5}} + 12005 x^{\frac{1}{5}}$ 和 $0$ 相加。

解题步骤 5.2.4.2

从 $490 x^{\frac{3}{5}}$ 中减去 $980 x^{\frac{3}{5}}$ 。

$f^{- 1} (7 (x^{\frac{1}{5}} + 7)) = x + 12005 x^{\frac{1}{5}} - 490 x^{\frac{3}{5}} - 48020 x^{\frac{1}{5}} + 490 x^{\frac{3}{5}} + 72030 x^{\frac{1}{5}} - 48020 x^{\frac{1}{5}} + 12005 x^{\frac{1}{5}}$

解题步骤 5.2.4.3

合并 $x + 12005 x^{\frac{1}{5}} - 490 x^{\frac{3}{5}} - 48020 x^{\frac{1}{5}} + 490 x^{\frac{3}{5}} + 72030 x^{\frac{1}{5}} - 48020 x^{\frac{1}{5}} + 12005 x^{\frac{1}{5}}$ 中相反的项。

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解题步骤 5.2.4.3.1

将 $- 490 x^{\frac{3}{5}}$ 和 $490 x^{\frac{3}{5}}$ 相加。

$f^{- 1} (7 (x^{\frac{1}{5}} + 7)) = x + 12005 x^{\frac{1}{5}} - 48020 x^{\frac{1}{5}} + 0 + 72030 x^{\frac{1}{5}} - 48020 x^{\frac{1}{5}} + 12005 x^{\frac{1}{5}}$

解题步骤 5.2.4.3.2

将 $x + 12005 x^{\frac{1}{5}} - 48020 x^{\frac{1}{5}}$ 和 $0$ 相加。

$f^{- 1} (7 (x^{\frac{1}{5}} + 7)) = x + 12005 x^{\frac{1}{5}} - 48020 x^{\frac{1}{5}} + 72030 x^{\frac{1}{5}} - 48020 x^{\frac{1}{5}} + 12005 x^{\frac{1}{5}}$

解题步骤 5.2.4.4

从 $12005 x^{\frac{1}{5}}$ 中减去 $48020 x^{\frac{1}{5}}$ 。

$f^{- 1} (7 (x^{\frac{1}{5}} + 7)) = x - 36015 x^{\frac{1}{5}} + 72030 x^{\frac{1}{5}} - 48020 x^{\frac{1}{5}} + 12005 x^{\frac{1}{5}}$

解题步骤 5.2.4.5

将 $- 36015 x^{\frac{1}{5}}$ 和 $72030 x^{\frac{1}{5}}$ 相加。

$f^{- 1} (7 (x^{\frac{1}{5}} + 7)) = x + 36015 x^{\frac{1}{5}} - 48020 x^{\frac{1}{5}} + 12005 x^{\frac{1}{5}}$

解题步骤 5.2.4.6

从 $36015 x^{\frac{1}{5}}$ 中减去 $48020 x^{\frac{1}{5}}$ 。

$f^{- 1} (7 (x^{\frac{1}{5}} + 7)) = x - 12005 x^{\frac{1}{5}} + 12005 x^{\frac{1}{5}}$

解题步骤 5.2.4.7

合并 $x - 12005 x^{\frac{1}{5}} + 12005 x^{\frac{1}{5}}$ 中相反的项。

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解题步骤 5.2.4.7.1

将 $- 12005 x^{\frac{1}{5}}$ 和 $12005 x^{\frac{1}{5}}$ 相加。

$f^{- 1} (7 (x^{\frac{1}{5}} + 7)) = x + 0$

解题步骤 5.2.4.7.2

将 $x$ 和 $0$ 相加。

$f^{- 1} (7 (x^{\frac{1}{5}} + 7)) = x$

解题步骤 5.3

计算 $f (f^{- 1} (x))$ 。

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解题步骤 5.3.1

建立复合结果函数。

$f (f^{- 1} (x))$

解题步骤 5.3.2

通过将 $f^{- 1}$ 的值代入 $f$ 来计算 $f (\frac{x^{5}}{16807} - \frac{5 x^{4}}{343} + \frac{10 x^{3}}{7} - 70 x^{2} + 1715 x - 16807)$ 。

$f (\frac{x^{5}}{16807} - \frac{5 x^{4}}{343} + \frac{10 x^{3}}{7} - 70 x^{2} + 1715 x - 16807) = 7 ({(\frac{x^{5}}{16807} - \frac{5 x^{4}}{343} + \frac{10 x^{3}}{7} - 70 x^{2} + 1715 x - 16807)}^{\frac{1}{5}} + 7)$

解题步骤 5.3.3

运用分配律。

$f (\frac{x^{5}}{16807} - \frac{5 x^{4}}{343} + \frac{10 x^{3}}{7} - 70 x^{2} + 1715 x - 16807) = 7 {(\frac{x^{5}}{16807} - \frac{5 x^{4}}{343} + \frac{10 x^{3}}{7} - 70 x^{2} + 1715 x - 16807)}^{\frac{1}{5}} + 7 \cdot 7$

解题步骤 5.3.4

将 $7$ 乘以 $7$ 。

解题步骤 5.4

由于 $f^{- 1} (f (x)) = x$ 和 $f (f^{- 1} (x)) = x$ ，因此 $f^{- 1} (x) = \frac{x^{5}}{16807} - \frac{5 x^{4}}{343} + \frac{10 x^{3}}{7} - 70 x^{2} + 1715 x - 16807$ 为 $f (x) = 7 (x^{\frac{1}{5}} + 7)$ 的反函数。

$f^{- 1} (x) = \frac{x^{5}}{16807} - \frac{5 x^{4}}{343} + \frac{10 x^{3}}{7} - 70 x^{2} + 1715 x - 16807$

初级微积分 示例

初级微积分示例