Calculus Examples

$\frac{d y}{d x} + 8 y = 2 x^{3} y^{\frac{3}{4}}$

Step 1

To solve the differential equation, let $v = y^{1 - n}$ where $n$ is the exponent of $y^{\frac{3}{4}}$ .

$v = y^{\frac{1}{4}}$

Step 2

Solve the equation for $y$ .

$y = v^{4}$

Step 3

Take the derivative of $y$ with respect to $x$ .

$y' = v^{4}$

Step 4

Take the derivative of $v^{4}$ with respect to $x$ .

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Step 4.1

Take the derivative of $v^{4}$ .

$y' = \frac{d}{d x} [v^{4}]$

Step 4.2

Differentiate using the chain rule, which states that $\frac{d}{d x} [f (g (x))]$ is $f' (g (x)) g' (x)$ where $f (x) = x^{4}$ and $g (x) = v$ .

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Step 4.2.1

To apply the Chain Rule, set $u$ as $v$ .

$y' = \frac{d}{d u} [u^{4}] \frac{d}{d x} [v]$

Step 4.2.2

Differentiate using the Power Rule which states that $\frac{d}{d u} [u^{n}]$ is $n u^{n - 1}$ where $n = 4$ .

$y' = 4 u^{3} \frac{d}{d x} [v]$

Step 4.2.3

Replace all occurrences of $u$ with $v$ .

$y' = 4 v^{3} \frac{d}{d x} [v]$

Step 4.3

Rewrite $\frac{d}{d x} [v]$ as $v'$ .

$y' = 4 v^{3} v'$

Step 5

Substitute $4 v^{3} v'$ for $\frac{d y}{d x}$ and $v^{4}$ for $y$ in the original equation $\frac{d y}{d x} + 8 y = 2 x^{3} y^{\frac{3}{4}}$ .

$4 v^{3} v' + 8 v^{4} = 2 x^{3} {(v^{4})}^{\frac{3}{4}}$

Step 6

Solve the substituted differential equation.

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Step 6.1

Rewrite the differential equation as $\frac{d v}{d x} + M (x) v = Q (x)$ .

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Step 6.1.1

Divide each term in $4 v^{3} \frac{d v}{d x} + 8 v^{4} = 2 x^{3} {(v^{4})}^{\frac{3}{4}}$ by $4 v^{3}$ and simplify.

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Step 6.1.1.1

Divide each term in $4 v^{3} \frac{d v}{d x} + 8 v^{4} = 2 x^{3} {(v^{4})}^{\frac{3}{4}}$ by $4 v^{3}$ .

$\frac{4 v^{3} \frac{d v}{d x}}{4 v^{3}} + \frac{8 v^{4}}{4 v^{3}} = \frac{2 x^{3} {(v^{4})}^{\frac{3}{4}}}{4 v^{3}}$

Step 6.1.1.2

Simplify the left side.

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Step 6.1.1.2.1

Simplify each term.

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Step 6.1.1.2.1.1

Cancel the common factor of $4$ .

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Step 6.1.1.2.1.1.1

Cancel the common factor.

$\frac{4 v^{3} \frac{d v}{d x}}{4 v^{3}} + \frac{8 v^{4}}{4 v^{3}} = \frac{2 x^{3} {(v^{4})}^{\frac{3}{4}}}{4 v^{3}}$

Step 6.1.1.2.1.1.2

Rewrite the expression.

$\frac{v^{3} \frac{d v}{d x}}{v^{3}} + \frac{8 v^{4}}{4 v^{3}} = \frac{2 x^{3} {(v^{4})}^{\frac{3}{4}}}{4 v^{3}}$

Step 6.1.1.2.1.2

Cancel the common factor of $v^{3}$ .

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Step 6.1.1.2.1.2.1

Cancel the common factor.

$\frac{v^{3} \frac{d v}{d x}}{v^{3}} + \frac{8 v^{4}}{4 v^{3}} = \frac{2 x^{3} {(v^{4})}^{\frac{3}{4}}}{4 v^{3}}$

Step 6.1.1.2.1.2.2

Divide $\frac{d v}{d x}$ by $1$ .

$\frac{d v}{d x} + \frac{8 v^{4}}{4 v^{3}} = \frac{2 x^{3} {(v^{4})}^{\frac{3}{4}}}{4 v^{3}}$

Step 6.1.1.2.1.3

Cancel the common factor of $8$ and $4$ .

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Step 6.1.1.2.1.3.1

Factor $4$ out of $8 v^{4}$ .

$\frac{d v}{d x} + \frac{4 (2 v^{4})}{4 v^{3}} = \frac{2 x^{3} {(v^{4})}^{\frac{3}{4}}}{4 v^{3}}$

Step 6.1.1.2.1.3.2

Cancel the common factors.

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Step 6.1.1.2.1.3.2.1

Factor $4$ out of $4 v^{3}$ .

$\frac{d v}{d x} + \frac{4 (2 v^{4})}{4 (v^{3})} = \frac{2 x^{3} {(v^{4})}^{\frac{3}{4}}}{4 v^{3}}$

Step 6.1.1.2.1.3.2.2

Cancel the common factor.

$\frac{d v}{d x} + \frac{4 (2 v^{4})}{4 v^{3}} = \frac{2 x^{3} {(v^{4})}^{\frac{3}{4}}}{4 v^{3}}$

Step 6.1.1.2.1.3.2.3

Rewrite the expression.

$\frac{d v}{d x} + \frac{2 v^{4}}{v^{3}} = \frac{2 x^{3} {(v^{4})}^{\frac{3}{4}}}{4 v^{3}}$

Step 6.1.1.2.1.4

Cancel the common factor of $v^{4}$ and $v^{3}$ .

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Step 6.1.1.2.1.4.1

Factor $v^{3}$ out of $2 v^{4}$ .

$\frac{d v}{d x} + \frac{v^{3} (2 v)}{v^{3}} = \frac{2 x^{3} {(v^{4})}^{\frac{3}{4}}}{4 v^{3}}$

Step 6.1.1.2.1.4.2

Cancel the common factors.

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Step 6.1.1.2.1.4.2.1

Multiply by $1$ .

$\frac{d v}{d x} + \frac{v^{3} (2 v)}{v^{3} \cdot 1} = \frac{2 x^{3} {(v^{4})}^{\frac{3}{4}}}{4 v^{3}}$

Step 6.1.1.2.1.4.2.2

Cancel the common factor.

$\frac{d v}{d x} + \frac{v^{3} (2 v)}{v^{3} \cdot 1} = \frac{2 x^{3} {(v^{4})}^{\frac{3}{4}}}{4 v^{3}}$

Step 6.1.1.2.1.4.2.3

Rewrite the expression.

$\frac{d v}{d x} + \frac{2 v}{1} = \frac{2 x^{3} {(v^{4})}^{\frac{3}{4}}}{4 v^{3}}$

Step 6.1.1.2.1.4.2.4

Divide $2 v$ by $1$ .

$\frac{d v}{d x} + 2 v = \frac{2 x^{3} {(v^{4})}^{\frac{3}{4}}}{4 v^{3}}$

Step 6.1.1.3

Simplify the right side.

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Step 6.1.1.3.1

Factor $2$ out of $2 x^{3} {(v^{4})}^{\frac{3}{4}}$ .

$\frac{d v}{d x} + 2 v = \frac{2 (x^{3} {(v^{4})}^{\frac{3}{4}})}{4 v^{3}}$

Step 6.1.1.3.2

Cancel the common factors.

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Step 6.1.1.3.2.1

Factor $2$ out of $4 v^{3}$ .

$\frac{d v}{d x} + 2 v = \frac{2 (x^{3} {(v^{4})}^{\frac{3}{4}})}{2 (2 v^{3})}$

Step 6.1.1.3.2.2

Cancel the common factor.

$\frac{d v}{d x} + 2 v = \frac{2 (x^{3} {(v^{4})}^{\frac{3}{4}})}{2 (2 v^{3})}$

Step 6.1.1.3.2.3

Rewrite the expression.

$\frac{d v}{d x} + 2 v = \frac{x^{3} {(v^{4})}^{\frac{3}{4}}}{2 v^{3}}$

Step 6.1.1.3.3

Multiply the exponents in ${(v^{4})}^{\frac{3}{4}}$ .

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Step 6.1.1.3.3.1

Apply the power rule and multiply exponents, ${(a^{m})}^{n} = a^{m n}$ .

$\frac{d v}{d x} + 2 v = \frac{x^{3} v^{4 (\frac{3}{4})}}{2 v^{3}}$

Step 6.1.1.3.3.2

Cancel the common factor of $4$ .

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Step 6.1.1.3.3.2.1

Cancel the common factor.

$\frac{d v}{d x} + 2 v = \frac{x^{3} v^{4 (\frac{3}{4})}}{2 v^{3}}$

Step 6.1.1.3.3.2.2

Rewrite the expression.

$\frac{d v}{d x} + 2 v = \frac{x^{3} v^{3}}{2 v^{3}}$

Step 6.1.1.3.4

Cancel the common factor of $v^{3}$ .

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Step 6.1.1.3.4.1

Cancel the common factor.

$\frac{d v}{d x} + 2 v = \frac{x^{3} v^{3}}{2 v^{3}}$

Step 6.1.1.3.4.2

Rewrite the expression.

$\frac{d v}{d x} + 2 v = \frac{x^{3}}{2}$

Step 6.1.2

Rewrite the equation with isolated coefficients.

$\frac{d v}{d x} + 2 v = \frac{1}{2} x^{3}$

Step 6.2

The integrating factor is defined by the formula $e^{\int P (x) d x}$ , where $P (x) = 2$ .

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Step 6.2.1

Set up the integration.

$e^{\int 2 d x}$

Step 6.2.2

Apply the constant rule.

$e^{2 x + C}$

Step 6.2.3

Remove the constant of integration.

$e^{2 x}$

Step 6.3

Multiply each term by the integrating factor $e^{2 x}$ .

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Step 6.3.1

Multiply each term by $e^{2 x}$ .

$e^{2 x} \frac{d v}{d x} + e^{2 x} (2 v) = e^{2 x} (\frac{1}{2} x^{3})$

Step 6.3.2

Rewrite using the commutative property of multiplication.

$e^{2 x} \frac{d v}{d x} + 2 e^{2 x} v = e^{2 x} (\frac{1}{2} x^{3})$

Step 6.3.3

Rewrite using the commutative property of multiplication.

$e^{2 x} \frac{d v}{d x} + 2 e^{2 x} v = \frac{1}{2} e^{2 x} x^{3}$

Step 6.3.4

Combine $\frac{1}{2}$ and $e^{2 x}$ .

$e^{2 x} \frac{d v}{d x} + 2 e^{2 x} v = \frac{e^{2 x}}{2} x^{3}$

Step 6.3.5

Combine $\frac{e^{2 x}}{2}$ and $x^{3}$ .

$e^{2 x} \frac{d v}{d x} + 2 e^{2 x} v = \frac{e^{2 x} x^{3}}{2}$

Step 6.3.6

Reorder factors in $e^{2 x} \frac{d v}{d x} + 2 e^{2 x} v = \frac{e^{2 x} x^{3}}{2}$ .

$e^{2 x} \frac{d v}{d x} + 2 v e^{2 x} = \frac{x^{3} e^{2 x}}{2}$

Step 6.4

Rewrite the left side as a result of differentiating a product.

$\frac{d}{d x} [e^{2 x} v] = \frac{x^{3} e^{2 x}}{2}$

Step 6.5

Set up an integral on each side.

$\int \frac{d}{d x} [e^{2 x} v] d x = \int \frac{x^{3} e^{2 x}}{2} d x$

Step 6.6

Integrate the left side.

$e^{2 x} v = \int \frac{x^{3} e^{2 x}}{2} d x$

Step 6.7

Integrate the right side.

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Step 6.7.1

Since $\frac{1}{2}$ is constant with respect to $x$ , move $\frac{1}{2}$ out of the integral.

$e^{2 x} v = \frac{1}{2} \int x^{3} e^{2 x} d x$

Step 6.7.2

Integrate by parts using the formula $\int u d v = u v - \int v d u$ , where $u = x^{3}$ and $d v = e^{2 x}$ .

$e^{2 x} v = \frac{1}{2} (x^{3} (\frac{1}{2} e^{2 x}) - \int \frac{1}{2} e^{2 x} (3 x^{2}) d x)$

Step 6.7.3

Simplify.

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Step 6.7.3.1

Combine $\frac{1}{2}$ and $e^{2 x}$ .

$e^{2 x} v = \frac{1}{2} (x^{3} \frac{e^{2 x}}{2} - \int \frac{1}{2} e^{2 x} (3 x^{2}) d x)$

Step 6.7.3.2

Combine $x^{3}$ and $\frac{e^{2 x}}{2}$ .

$e^{2 x} v = \frac{1}{2} (\frac{x^{3} e^{2 x}}{2} - \int \frac{1}{2} e^{2 x} (3 x^{2}) d x)$

Step 6.7.3.3

Combine $\frac{1}{2}$ and $e^{2 x}$ .

$e^{2 x} v = \frac{1}{2} (\frac{x^{3} e^{2 x}}{2} - \int \frac{e^{2 x}}{2} (3 x^{2}) d x)$

Step 6.7.3.4

Combine $3$ and $\frac{e^{2 x}}{2}$ .

$e^{2 x} v = \frac{1}{2} (\frac{x^{3} e^{2 x}}{2} - \int \frac{3 e^{2 x}}{2} x^{2} d x)$

Step 6.7.3.5

Combine $\frac{3 e^{2 x}}{2}$ and $x^{2}$ .

$e^{2 x} v = \frac{1}{2} (\frac{x^{3} e^{2 x}}{2} - \int \frac{3 e^{2 x} x^{2}}{2} d x)$

Step 6.7.4

Since $\frac{3}{2}$ is constant with respect to $x$ , move $\frac{3}{2}$ out of the integral.

$e^{2 x} v = \frac{1}{2} (\frac{x^{3} e^{2 x}}{2} - (\frac{3}{2} \int e^{2 x} x^{2} d x))$

Step 6.7.5

Integrate by parts using the formula $\int u d v = u v - \int v d u$ , where $u = x^{2}$ and $d v = e^{2 x}$ .

$e^{2 x} v = \frac{1}{2} (\frac{x^{3} e^{2 x}}{2} - \frac{3}{2} (x^{2} (\frac{1}{2} e^{2 x}) - \int \frac{1}{2} e^{2 x} (2 x) d x))$

Step 6.7.6

Simplify.

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Step 6.7.6.1

Combine $\frac{1}{2}$ and $e^{2 x}$ .

$e^{2 x} v = \frac{1}{2} (\frac{x^{3} e^{2 x}}{2} - \frac{3}{2} (x^{2} \frac{e^{2 x}}{2} - \int \frac{1}{2} e^{2 x} (2 x) d x))$

Step 6.7.6.2

Combine $x^{2}$ and $\frac{e^{2 x}}{2}$ .

$e^{2 x} v = \frac{1}{2} (\frac{x^{3} e^{2 x}}{2} - \frac{3}{2} (\frac{x^{2} e^{2 x}}{2} - \int \frac{1}{2} e^{2 x} (2 x) d x))$

Step 6.7.6.3

Combine $\frac{1}{2}$ and $e^{2 x}$ .

$e^{2 x} v = \frac{1}{2} (\frac{x^{3} e^{2 x}}{2} - \frac{3}{2} (\frac{x^{2} e^{2 x}}{2} - \int \frac{e^{2 x}}{2} (2 x) d x))$

Step 6.7.6.4

Combine $2$ and $\frac{e^{2 x}}{2}$ .

$e^{2 x} v = \frac{1}{2} (\frac{x^{3} e^{2 x}}{2} - \frac{3}{2} (\frac{x^{2} e^{2 x}}{2} - \int \frac{2 e^{2 x}}{2} x d x))$

Step 6.7.6.5

Combine $\frac{2 e^{2 x}}{2}$ and $x$ .

$e^{2 x} v = \frac{1}{2} (\frac{x^{3} e^{2 x}}{2} - \frac{3}{2} (\frac{x^{2} e^{2 x}}{2} - \int \frac{2 e^{2 x} x}{2} d x))$

Step 6.7.6.6

Cancel the common factor of $2$ .

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Step 6.7.6.6.1

Cancel the common factor.

$e^{2 x} v = \frac{1}{2} (\frac{x^{3} e^{2 x}}{2} - \frac{3}{2} (\frac{x^{2} e^{2 x}}{2} - \int \frac{2 e^{2 x} x}{2} d x))$

Step 6.7.6.6.2

Divide $e^{2 x} x$ by $1$ .

$e^{2 x} v = \frac{1}{2} (\frac{x^{3} e^{2 x}}{2} - \frac{3}{2} (\frac{x^{2} e^{2 x}}{2} - \int e^{2 x} x d x))$

Step 6.7.7

Integrate by parts using the formula $\int u d v = u v - \int v d u$ , where $u = x$ and $d v = e^{2 x}$ .

$e^{2 x} v = \frac{1}{2} (\frac{x^{3} e^{2 x}}{2} - \frac{3}{2} (\frac{x^{2} e^{2 x}}{2} - (x (\frac{1}{2} e^{2 x}) - \int \frac{1}{2} e^{2 x} d x)))$

Step 6.7.8

Simplify.

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Step 6.7.8.1

Combine $\frac{1}{2}$ and $e^{2 x}$ .

$e^{2 x} v = \frac{1}{2} (\frac{x^{3} e^{2 x}}{2} - \frac{3}{2} (\frac{x^{2} e^{2 x}}{2} - (x \frac{e^{2 x}}{2} - \int \frac{1}{2} e^{2 x} d x)))$

Step 6.7.8.2

Combine $x$ and $\frac{e^{2 x}}{2}$ .

$e^{2 x} v = \frac{1}{2} (\frac{x^{3} e^{2 x}}{2} - \frac{3}{2} (\frac{x^{2} e^{2 x}}{2} - (\frac{x e^{2 x}}{2} - \int \frac{1}{2} e^{2 x} d x)))$

Step 6.7.8.3

Combine $\frac{1}{2}$ and $e^{2 x}$ .

$e^{2 x} v = \frac{1}{2} (\frac{x^{3} e^{2 x}}{2} - \frac{3}{2} (\frac{x^{2} e^{2 x}}{2} - (\frac{x e^{2 x}}{2} - \int \frac{e^{2 x}}{2} d x)))$

Step 6.7.9

Since $\frac{1}{2}$ is constant with respect to $x$ , move $\frac{1}{2}$ out of the integral.

$e^{2 x} v = \frac{1}{2} (\frac{x^{3} e^{2 x}}{2} - \frac{3}{2} (\frac{x^{2} e^{2 x}}{2} - (\frac{x e^{2 x}}{2} - (\frac{1}{2} \int e^{2 x} d x))))$

Step 6.7.10

Let $u = 2 x$ . Then $d u = 2 d x$ , so $\frac{1}{2} d u = d x$ . Rewrite using $u$ and $d$ $u$ .

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Step 6.7.10.1

Let $u = 2 x$ . Find $\frac{d u}{d x}$ .

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Step 6.7.10.1.1

Differentiate $2 x$ .

$\frac{d}{d x} [2 x]$

Step 6.7.10.1.2

Since $2$ is constant with respect to $x$ , the derivative of $2 x$ with respect to $x$ is $2 \frac{d}{d x} [x]$ .

$2 \frac{d}{d x} [x]$

Step 6.7.10.1.3

Differentiate using the Power Rule which states that $\frac{d}{d x} [x^{n}]$ is $n x^{n - 1}$ where $n = 1$ .

$2 \cdot 1$

Step 6.7.10.1.4

Multiply $2$ by $1$ .

$2$

Step 6.7.10.2

Rewrite the problem using $u$ and $d u$ .

$e^{2 x} v = \frac{1}{2} (\frac{x^{3} e^{2 x}}{2} - \frac{3}{2} (\frac{x^{2} e^{2 x}}{2} - (\frac{x e^{2 x}}{2} - \frac{1}{2} \int e^{u} \frac{1}{2} d u)))$

Step 6.7.11

Combine $e^{u}$ and $\frac{1}{2}$ .

$e^{2 x} v = \frac{1}{2} (\frac{x^{3} e^{2 x}}{2} - \frac{3}{2} (\frac{x^{2} e^{2 x}}{2} - (\frac{x e^{2 x}}{2} - \frac{1}{2} \int \frac{e^{u}}{2} d u)))$

Step 6.7.12

Since $\frac{1}{2}$ is constant with respect to $u$ , move $\frac{1}{2}$ out of the integral.

$e^{2 x} v = \frac{1}{2} (\frac{x^{3} e^{2 x}}{2} - \frac{3}{2} (\frac{x^{2} e^{2 x}}{2} - (\frac{x e^{2 x}}{2} - \frac{1}{2} (\frac{1}{2} \int e^{u} d u))))$

Step 6.7.13

Simplify.

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Step 6.7.13.1

Multiply $\frac{1}{2}$ by $\frac{1}{2}$ .

$e^{2 x} v = \frac{1}{2} (\frac{x^{3} e^{2 x}}{2} - \frac{3}{2} (\frac{x^{2} e^{2 x}}{2} - (\frac{x e^{2 x}}{2} - \frac{1}{2 \cdot 2} \int e^{u} d u)))$

Step 6.7.13.2

Multiply $2$ by $2$ .

$e^{2 x} v = \frac{1}{2} (\frac{x^{3} e^{2 x}}{2} - \frac{3}{2} (\frac{x^{2} e^{2 x}}{2} - (\frac{x e^{2 x}}{2} - \frac{1}{4} \int e^{u} d u)))$

Step 6.7.14

The integral of $e^{u}$ with respect to $u$ is $e^{u}$ .

$e^{2 x} v = \frac{1}{2} (\frac{x^{3} e^{2 x}}{2} - \frac{3}{2} (\frac{x^{2} e^{2 x}}{2} - (\frac{x e^{2 x}}{2} - \frac{1}{4} (e^{u} + C))))$

Step 6.7.15

Rewrite $\frac{1}{2} (\frac{x^{3} e^{2 x}}{2} - \frac{3}{2} (\frac{x^{2} e^{2 x}}{2} - (\frac{x e^{2 x}}{2} - \frac{1}{4} (e^{u} + C))))$ as $\frac{1}{2} (\frac{x^{3} e^{2 x}}{2} - \frac{3 x^{2} e^{2 x}}{4} + \frac{3 x e^{2 x}}{4} - \frac{3 e^{u}}{8}) + C$ .

$e^{2 x} v = \frac{1}{2} (\frac{x^{3} e^{2 x}}{2} - \frac{3 x^{2} e^{2 x}}{4} + \frac{3 x e^{2 x}}{4} - \frac{3 e^{u}}{8}) + C$

Step 6.7.16

Replace all occurrences of $u$ with $2 x$ .

$e^{2 x} v = \frac{1}{2} (\frac{x^{3} e^{2 x}}{2} - \frac{3 x^{2} e^{2 x}}{4} + \frac{3 x e^{2 x}}{4} - \frac{3 e^{2 x}}{8}) + C$

Step 6.7.17

Simplify.

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Step 6.7.17.1

Apply the distributive property.

$e^{2 x} v = \frac{1}{2} \cdot \frac{x^{3} e^{2 x}}{2} + \frac{1}{2} (- \frac{3 x^{2} e^{2 x}}{4}) + \frac{1}{2} \cdot \frac{3 x e^{2 x}}{4} + \frac{1}{2} (- \frac{3 e^{2 x}}{8}) + C$

Step 6.7.17.2

Simplify.

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Step 6.7.17.2.1

Combine.

$e^{2 x} v = \frac{1 (x^{3} e^{2 x})}{2 \cdot 2} + \frac{1}{2} (- \frac{3 x^{2} e^{2 x}}{4}) + \frac{1}{2} \cdot \frac{3 x e^{2 x}}{4} + \frac{1}{2} (- \frac{3 e^{2 x}}{8}) + C$

Step 6.7.17.2.2

Multiply $\frac{1}{2} (- \frac{3 x^{2} e^{2 x}}{4})$ .

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Step 6.7.17.2.2.1

Multiply $\frac{1}{2}$ by $\frac{3 x^{2} e^{2 x}}{4}$ .

$e^{2 x} v = \frac{1 (x^{3} e^{2 x})}{2 \cdot 2} - \frac{3 x^{2} e^{2 x}}{2 \cdot 4} + \frac{1}{2} \cdot \frac{3 x e^{2 x}}{4} + \frac{1}{2} (- \frac{3 e^{2 x}}{8}) + C$

Step 6.7.17.2.2.2

Multiply $2$ by $4$ .

$e^{2 x} v = \frac{1 (x^{3} e^{2 x})}{2 \cdot 2} - \frac{3 x^{2} e^{2 x}}{8} + \frac{1}{2} \cdot \frac{3 x e^{2 x}}{4} + \frac{1}{2} (- \frac{3 e^{2 x}}{8}) + C$

Step 6.7.17.2.3

Combine.

$e^{2 x} v = \frac{1 (x^{3} e^{2 x})}{2 \cdot 2} - \frac{3 x^{2} e^{2 x}}{8} + \frac{1 (3 x e^{2 x})}{2 \cdot 4} + \frac{1}{2} (- \frac{3 e^{2 x}}{8}) + C$

Step 6.7.17.2.4

Multiply $\frac{1}{2} (- \frac{3 e^{2 x}}{8})$ .

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Step 6.7.17.2.4.1

Multiply $\frac{1}{2}$ by $\frac{3 e^{2 x}}{8}$ .

$e^{2 x} v = \frac{1 (x^{3} e^{2 x})}{2 \cdot 2} - \frac{3 x^{2} e^{2 x}}{8} + \frac{1 (3 x e^{2 x})}{2 \cdot 4} - \frac{3 e^{2 x}}{2 \cdot 8} + C$

Step 6.7.17.2.4.2

Multiply $2$ by $8$ .

$e^{2 x} v = \frac{1 (x^{3} e^{2 x})}{2 \cdot 2} - \frac{3 x^{2} e^{2 x}}{8} + \frac{1 (3 x e^{2 x})}{2 \cdot 4} - \frac{3 e^{2 x}}{16} + C$

Step 6.7.17.3

Simplify each term.

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Step 6.7.17.3.1

Multiply $x^{3}$ by $1$ .

$e^{2 x} v = \frac{x^{3} e^{2 x}}{2 \cdot 2} - \frac{3 x^{2} e^{2 x}}{8} + \frac{1 (3 x e^{2 x})}{2 \cdot 4} - \frac{3 e^{2 x}}{16} + C$

Step 6.7.17.3.2

Multiply $2$ by $2$ .

$e^{2 x} v = \frac{x^{3} e^{2 x}}{4} - \frac{3 x^{2} e^{2 x}}{8} + \frac{1 (3 x e^{2 x})}{2 \cdot 4} - \frac{3 e^{2 x}}{16} + C$

Step 6.7.17.3.3

Multiply $3$ by $1$ .

$e^{2 x} v = \frac{x^{3} e^{2 x}}{4} - \frac{3 x^{2} e^{2 x}}{8} + \frac{3 x e^{2 x}}{2 \cdot 4} - \frac{3 e^{2 x}}{16} + C$

Step 6.7.17.3.4

Multiply $2$ by $4$ .

$e^{2 x} v = \frac{x^{3} e^{2 x}}{4} - \frac{3 x^{2} e^{2 x}}{8} + \frac{3 x e^{2 x}}{8} - \frac{3 e^{2 x}}{16} + C$

Step 6.7.18

Reorder terms.

$e^{2 x} v = \frac{1}{4} x^{3} e^{2 x} - \frac{3}{8} x^{2} e^{2 x} + \frac{3}{8} x e^{2 x} - \frac{3}{16} e^{2 x} + C$

Step 6.8

Solve for $v$ .

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Step 6.8.1

Simplify.

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Step 6.8.1.1

Combine $\frac{1}{4}$ and $x^{3}$ .

$e^{2 x} v = \frac{x^{3}}{4} e^{2 x} - \frac{3}{8} x^{2} e^{2 x} + \frac{3}{8} x e^{2 x} - \frac{3}{16} e^{2 x} + C$

Step 6.8.1.2

Combine $\frac{x^{3}}{4}$ and $e^{2 x}$ .

$e^{2 x} v = \frac{x^{3} e^{2 x}}{4} - \frac{3}{8} x^{2} e^{2 x} + \frac{3}{8} x e^{2 x} - \frac{3}{16} e^{2 x} + C$

Step 6.8.1.3

Combine $x^{2}$ and $\frac{3}{8}$ .

$e^{2 x} v = \frac{x^{3} e^{2 x}}{4} - \frac{x^{2} \cdot 3}{8} e^{2 x} + \frac{3}{8} x e^{2 x} - \frac{3}{16} e^{2 x} + C$

Step 6.8.1.4

Combine $e^{2 x}$ and $\frac{x^{2} \cdot 3}{8}$ .

$e^{2 x} v = \frac{x^{3} e^{2 x}}{4} - \frac{e^{2 x} (x^{2} \cdot 3)}{8} + \frac{3}{8} x e^{2 x} - \frac{3}{16} e^{2 x} + C$

Step 6.8.1.5

Combine $\frac{3}{8}$ and $x$ .

$e^{2 x} v = \frac{x^{3} e^{2 x}}{4} - \frac{e^{2 x} (x^{2} \cdot 3)}{8} + \frac{3 x}{8} e^{2 x} - \frac{3}{16} e^{2 x} + C$

Step 6.8.1.6

Combine $\frac{3 x}{8}$ and $e^{2 x}$ .

$e^{2 x} v = \frac{x^{3} e^{2 x}}{4} - \frac{e^{2 x} (x^{2} \cdot 3)}{8} + \frac{3 x e^{2 x}}{8} - \frac{3}{16} e^{2 x} + C$

Step 6.8.1.7

Combine $e^{2 x}$ and $\frac{3}{16}$ .

$e^{2 x} v = \frac{x^{3} e^{2 x}}{4} - \frac{e^{2 x} (x^{2} \cdot 3)}{8} + \frac{3 x e^{2 x}}{8} - \frac{e^{2 x} \cdot 3}{16} + C$

Step 6.8.2

Divide each term in $e^{2 x} v = \frac{x^{3} e^{2 x}}{4} - \frac{e^{2 x} (x^{2} \cdot 3)}{8} + \frac{3 x e^{2 x}}{8} - \frac{e^{2 x} \cdot 3}{16} + C$ by $e^{2 x}$ and simplify.

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Step 6.8.2.1

Divide each term in $e^{2 x} v = \frac{x^{3} e^{2 x}}{4} - \frac{e^{2 x} (x^{2} \cdot 3)}{8} + \frac{3 x e^{2 x}}{8} - \frac{e^{2 x} \cdot 3}{16} + C$ by $e^{2 x}$ .

$\frac{e^{2 x} v}{e^{2 x}} = \frac{\frac{x^{3} e^{2 x}}{4}}{e^{2 x}} + \frac{- \frac{e^{2 x} (x^{2} \cdot 3)}{8}}{e^{2 x}} + \frac{\frac{3 x e^{2 x}}{8}}{e^{2 x}} + \frac{- \frac{e^{2 x} \cdot 3}{16}}{e^{2 x}} + \frac{C}{e^{2 x}}$

Step 6.8.2.2

Simplify the left side.

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Step 6.8.2.2.1

Cancel the common factor of $e^{2 x}$ .

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Step 6.8.2.2.1.1

Cancel the common factor.

Step 6.8.2.2.1.2

Divide $v$ by $1$ .

$v = \frac{\frac{x^{3} e^{2 x}}{4}}{e^{2 x}} + \frac{- \frac{e^{2 x} (x^{2} \cdot 3)}{8}}{e^{2 x}} + \frac{\frac{3 x e^{2 x}}{8}}{e^{2 x}} + \frac{- \frac{e^{2 x} \cdot 3}{16}}{e^{2 x}} + \frac{C}{e^{2 x}}$

Step 6.8.2.3

Simplify the right side.

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Step 6.8.2.3.1

Simplify each term.

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Step 6.8.2.3.1.1

Multiply the numerator by the reciprocal of the denominator.

$v = \frac{x^{3} e^{2 x}}{4} \cdot \frac{1}{e^{2 x}} + \frac{- \frac{e^{2 x} (x^{2} \cdot 3)}{8}}{e^{2 x}} + \frac{\frac{3 x e^{2 x}}{8}}{e^{2 x}} + \frac{- \frac{e^{2 x} \cdot 3}{16}}{e^{2 x}} + \frac{C}{e^{2 x}}$

Step 6.8.2.3.1.2

Combine.

$v = \frac{x^{3} e^{2 x} \cdot 1}{4 e^{2 x}} + \frac{- \frac{e^{2 x} (x^{2} \cdot 3)}{8}}{e^{2 x}} + \frac{\frac{3 x e^{2 x}}{8}}{e^{2 x}} + \frac{- \frac{e^{2 x} \cdot 3}{16}}{e^{2 x}} + \frac{C}{e^{2 x}}$

Step 6.8.2.3.1.3

Cancel the common factor of $e^{2 x}$ .

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Step 6.8.2.3.1.3.1

Cancel the common factor.

Step 6.8.2.3.1.3.2

Rewrite the expression.

$v = \frac{x^{3} \cdot 1}{4} + \frac{- \frac{e^{2 x} (x^{2} \cdot 3)}{8}}{e^{2 x}} + \frac{\frac{3 x e^{2 x}}{8}}{e^{2 x}} + \frac{- \frac{e^{2 x} \cdot 3}{16}}{e^{2 x}} + \frac{C}{e^{2 x}}$

Step 6.8.2.3.1.4

Multiply $x^{3}$ by $1$ .

$v = \frac{x^{3}}{4} + \frac{- \frac{e^{2 x} (x^{2} \cdot 3)}{8}}{e^{2 x}} + \frac{\frac{3 x e^{2 x}}{8}}{e^{2 x}} + \frac{- \frac{e^{2 x} \cdot 3}{16}}{e^{2 x}} + \frac{C}{e^{2 x}}$

Step 6.8.2.3.1.5

Multiply the numerator by the reciprocal of the denominator.

$v = \frac{x^{3}}{4} - \frac{e^{2 x} (x^{2} \cdot 3)}{8} \cdot \frac{1}{e^{2 x}} + \frac{\frac{3 x e^{2 x}}{8}}{e^{2 x}} + \frac{- \frac{e^{2 x} \cdot 3}{16}}{e^{2 x}} + \frac{C}{e^{2 x}}$

Step 6.8.2.3.1.6

Move $3$ to the left of $e^{2 x} x^{2}$ .

$v = \frac{x^{3}}{4} - \frac{3 \cdot (e^{2 x} x^{2})}{8} \cdot \frac{1}{e^{2 x}} + \frac{\frac{3 x e^{2 x}}{8}}{e^{2 x}} + \frac{- \frac{e^{2 x} \cdot 3}{16}}{e^{2 x}} + \frac{C}{e^{2 x}}$

Step 6.8.2.3.1.7

Multiply $\frac{1}{e^{2 x}}$ by $\frac{3 e^{2 x} x^{2}}{8}$ .

$v = \frac{x^{3}}{4} - \frac{3 e^{2 x} x^{2}}{e^{2 x} \cdot 8} + \frac{\frac{3 x e^{2 x}}{8}}{e^{2 x}} + \frac{- \frac{e^{2 x} \cdot 3}{16}}{e^{2 x}} + \frac{C}{e^{2 x}}$

Step 6.8.2.3.1.8

Cancel the common factor of $e^{2 x}$ .

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Step 6.8.2.3.1.8.1

Cancel the common factor.

$v = \frac{x^{3}}{4} - \frac{3 e^{2 x} x^{2}}{e^{2 x} \cdot 8} + \frac{\frac{3 x e^{2 x}}{8}}{e^{2 x}} + \frac{- \frac{e^{2 x} \cdot 3}{16}}{e^{2 x}} + \frac{C}{e^{2 x}}$

Step 6.8.2.3.1.8.2

Rewrite the expression.

$v = \frac{x^{3}}{4} - \frac{3 x^{2}}{8} + \frac{\frac{3 x e^{2 x}}{8}}{e^{2 x}} + \frac{- \frac{e^{2 x} \cdot 3}{16}}{e^{2 x}} + \frac{C}{e^{2 x}}$

Step 6.8.2.3.1.9

Multiply the numerator by the reciprocal of the denominator.

$v = \frac{x^{3}}{4} - \frac{3 x^{2}}{8} + \frac{3 x e^{2 x}}{8} \cdot \frac{1}{e^{2 x}} + \frac{- \frac{e^{2 x} \cdot 3}{16}}{e^{2 x}} + \frac{C}{e^{2 x}}$

Step 6.8.2.3.1.10

Combine.

$v = \frac{x^{3}}{4} - \frac{3 x^{2}}{8} + \frac{3 x e^{2 x} \cdot 1}{8 e^{2 x}} + \frac{- \frac{e^{2 x} \cdot 3}{16}}{e^{2 x}} + \frac{C}{e^{2 x}}$

Step 6.8.2.3.1.11

Cancel the common factor of $e^{2 x}$ .

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Step 6.8.2.3.1.11.1

Cancel the common factor.

$v = \frac{x^{3}}{4} - \frac{3 x^{2}}{8} + \frac{3 x e^{2 x} \cdot 1}{8 e^{2 x}} + \frac{- \frac{e^{2 x} \cdot 3}{16}}{e^{2 x}} + \frac{C}{e^{2 x}}$

Step 6.8.2.3.1.11.2

Rewrite the expression.

$v = \frac{x^{3}}{4} - \frac{3 x^{2}}{8} + \frac{3 x \cdot 1}{8} + \frac{- \frac{e^{2 x} \cdot 3}{16}}{e^{2 x}} + \frac{C}{e^{2 x}}$

Step 6.8.2.3.1.12

Multiply $3$ by $1$ .

$v = \frac{x^{3}}{4} - \frac{3 x^{2}}{8} + \frac{3 x}{8} + \frac{- \frac{e^{2 x} \cdot 3}{16}}{e^{2 x}} + \frac{C}{e^{2 x}}$

Step 6.8.2.3.1.13

Multiply the numerator by the reciprocal of the denominator.

$v = \frac{x^{3}}{4} - \frac{3 x^{2}}{8} + \frac{3 x}{8} - \frac{e^{2 x} \cdot 3}{16} \cdot \frac{1}{e^{2 x}} + \frac{C}{e^{2 x}}$

Step 6.8.2.3.1.14

Move $3$ to the left of $e^{2 x}$ .

$v = \frac{x^{3}}{4} - \frac{3 x^{2}}{8} + \frac{3 x}{8} - \frac{3 \cdot e^{2 x}}{16} \cdot \frac{1}{e^{2 x}} + \frac{C}{e^{2 x}}$

Step 6.8.2.3.1.15

Multiply $\frac{1}{e^{2 x}}$ by $\frac{3 e^{2 x}}{16}$ .

$v = \frac{x^{3}}{4} - \frac{3 x^{2}}{8} + \frac{3 x}{8} - \frac{3 e^{2 x}}{e^{2 x} \cdot 16} + \frac{C}{e^{2 x}}$

Step 6.8.2.3.1.16

Cancel the common factor of $e^{2 x}$ .

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Step 6.8.2.3.1.16.1

Cancel the common factor.

$v = \frac{x^{3}}{4} - \frac{3 x^{2}}{8} + \frac{3 x}{8} - \frac{3 e^{2 x}}{e^{2 x} \cdot 16} + \frac{C}{e^{2 x}}$

Step 6.8.2.3.1.16.2

Rewrite the expression.

$v = \frac{x^{3}}{4} - \frac{3 x^{2}}{8} + \frac{3 x}{8} - \frac{3}{16} + \frac{C}{e^{2 x}}$

Step 7

Substitute $y^{\frac{1}{4}}$ for $v$ .

$y^{\frac{1}{4}} = \frac{x^{3}}{4} - \frac{3 x^{2}}{8} + \frac{3 x}{8} - \frac{3}{16} + \frac{C}{e^{2 x}}$