Calculus Examples

$\sqrt{7 x + \sqrt{7 x + \sqrt{7 x}}}$

Step 1

Simplify with factoring out.

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Step 1.1

Use $\sqrt[n]{a^{x}} = a^{\frac{x}{n}}$ to rewrite $\sqrt{7 x}$ as ${(7 x)}^{\frac{1}{2}}$ .

$\frac{d}{d x} [\sqrt{7 x + \sqrt{7 x + {(7 x)}^{\frac{1}{2}}}}]$

Step 1.2

Factor $7$ out of $7 x$ .

$\frac{d}{d x} [\sqrt{7 x + \sqrt{7 x + {(7 (x))}^{\frac{1}{2}}}}]$

Step 1.3

Apply basic rules of exponents.

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Step 1.3.1

Apply the product rule to $7 (x)$ .

$\frac{d}{d x} [\sqrt{7 x + \sqrt{7 x + 7^{\frac{1}{2}} x^{\frac{1}{2}}}}]$

Step 1.3.2

Use $\sqrt[n]{a^{x}} = a^{\frac{x}{n}}$ to rewrite $\sqrt{7 x + 7^{\frac{1}{2}} x^{\frac{1}{2}}}$ as ${(7 x + 7^{\frac{1}{2}} x^{\frac{1}{2}})}^{\frac{1}{2}}$ .

$\frac{d}{d x} [\sqrt{7 x + {(7 x + 7^{\frac{1}{2}} x^{\frac{1}{2}})}^{\frac{1}{2}}}]$

Step 1.3.3

Use $\sqrt[n]{a^{x}} = a^{\frac{x}{n}}$ to rewrite $\sqrt{7 x + {(7 x + 7^{\frac{1}{2}} x^{\frac{1}{2}})}^{\frac{1}{2}}}$ as ${(7 x + {(7 x + 7^{\frac{1}{2}} x^{\frac{1}{2}})}^{\frac{1}{2}})}^{\frac{1}{2}}$ .

$\frac{d}{d x} [{(7 x + {(7 x + 7^{\frac{1}{2}} x^{\frac{1}{2}})}^{\frac{1}{2}})}^{\frac{1}{2}}]$

Step 2

Differentiate using the chain rule, which states that $\frac{d}{d x} [f (g (x))]$ is $f' (g (x)) g' (x)$ where $f (x) = x^{\frac{1}{2}}$ and $g (x) = 7 x + {(7 x + 7^{\frac{1}{2}} x^{\frac{1}{2}})}^{\frac{1}{2}}$ .

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Step 2.1

To apply the Chain Rule, set $u_{1}$ as $7 x + {(7 x + 7^{\frac{1}{2}} x^{\frac{1}{2}})}^{\frac{1}{2}}$ .

$\frac{d}{d u_{1}} [{u_{1}}^{\frac{1}{2}}] \frac{d}{d x} [7 x + {(7 x + 7^{\frac{1}{2}} x^{\frac{1}{2}})}^{\frac{1}{2}}]$

Step 2.2

Differentiate using the Power Rule which states that $\frac{d}{d u_{1}} [{u_{1}}^{n}]$ is $n {u_{1}}^{n - 1}$ where $n = \frac{1}{2}$ .

$\frac{1}{2} {u_{1}}^{\frac{1}{2} - 1} \frac{d}{d x} [7 x + {(7 x + 7^{\frac{1}{2}} x^{\frac{1}{2}})}^{\frac{1}{2}}]$

Step 2.3

Replace all occurrences of $u_{1}$ with $7 x + {(7 x + 7^{\frac{1}{2}} x^{\frac{1}{2}})}^{\frac{1}{2}}$ .

$\frac{1}{2} {(7 x + {(7 x + 7^{\frac{1}{2}} x^{\frac{1}{2}})}^{\frac{1}{2}})}^{\frac{1}{2} - 1} \frac{d}{d x} [7 x + {(7 x + 7^{\frac{1}{2}} x^{\frac{1}{2}})}^{\frac{1}{2}}]$

Step 3

To write $- 1$ as a fraction with a common denominator, multiply by $\frac{2}{2}$ .

$\frac{1}{2} {(7 x + {(7 x + 7^{\frac{1}{2}} x^{\frac{1}{2}})}^{\frac{1}{2}})}^{\frac{1}{2} - 1 \cdot \frac{2}{2}} \frac{d}{d x} [7 x + {(7 x + 7^{\frac{1}{2}} x^{\frac{1}{2}})}^{\frac{1}{2}}]$

Step 4

Combine $- 1$ and $\frac{2}{2}$ .

$\frac{1}{2} {(7 x + {(7 x + 7^{\frac{1}{2}} x^{\frac{1}{2}})}^{\frac{1}{2}})}^{\frac{1}{2} + \frac{- 1 \cdot 2}{2}} \frac{d}{d x} [7 x + {(7 x + 7^{\frac{1}{2}} x^{\frac{1}{2}})}^{\frac{1}{2}}]$

Step 5

Combine the numerators over the common denominator.

$\frac{1}{2} {(7 x + {(7 x + 7^{\frac{1}{2}} x^{\frac{1}{2}})}^{\frac{1}{2}})}^{\frac{1 - 1 \cdot 2}{2}} \frac{d}{d x} [7 x + {(7 x + 7^{\frac{1}{2}} x^{\frac{1}{2}})}^{\frac{1}{2}}]$

Step 6

Simplify the numerator.

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Step 6.1

Multiply $- 1$ by $2$ .

$\frac{1}{2} {(7 x + {(7 x + 7^{\frac{1}{2}} x^{\frac{1}{2}})}^{\frac{1}{2}})}^{\frac{1 - 2}{2}} \frac{d}{d x} [7 x + {(7 x + 7^{\frac{1}{2}} x^{\frac{1}{2}})}^{\frac{1}{2}}]$

Step 6.2

Subtract $2$ from $1$ .

$\frac{1}{2} {(7 x + {(7 x + 7^{\frac{1}{2}} x^{\frac{1}{2}})}^{\frac{1}{2}})}^{\frac{- 1}{2}} \frac{d}{d x} [7 x + {(7 x + 7^{\frac{1}{2}} x^{\frac{1}{2}})}^{\frac{1}{2}}]$

Step 7

Differentiate.

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Step 7.1

Move the negative in front of the fraction.

$\frac{1}{2} {(7 x + {(7 x + 7^{\frac{1}{2}} x^{\frac{1}{2}})}^{\frac{1}{2}})}^{- \frac{1}{2}} \frac{d}{d x} [7 x + {(7 x + 7^{\frac{1}{2}} x^{\frac{1}{2}})}^{\frac{1}{2}}]$

Step 7.2

Combine fractions.

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Step 7.2.1

Combine $\frac{1}{2}$ and ${(7 x + {(7 x + 7^{\frac{1}{2}} x^{\frac{1}{2}})}^{\frac{1}{2}})}^{- \frac{1}{2}}$ .

$\frac{{(7 x + {(7 x + 7^{\frac{1}{2}} x^{\frac{1}{2}})}^{\frac{1}{2}})}^{- \frac{1}{2}}}{2} \frac{d}{d x} [7 x + {(7 x + 7^{\frac{1}{2}} x^{\frac{1}{2}})}^{\frac{1}{2}}]$

Step 7.2.2

Move ${(7 x + {(7 x + 7^{\frac{1}{2}} x^{\frac{1}{2}})}^{\frac{1}{2}})}^{- \frac{1}{2}}$ to the denominator using the negative exponent rule $b^{- n} = \frac{1}{b^{n}}$ .

$\frac{1}{2 {(7 x + {(7 x + 7^{\frac{1}{2}} x^{\frac{1}{2}})}^{\frac{1}{2}})}^{\frac{1}{2}}} \frac{d}{d x} [7 x + {(7 x + 7^{\frac{1}{2}} x^{\frac{1}{2}})}^{\frac{1}{2}}]$

Step 7.3

By the Sum Rule, the derivative of $7 x + {(7 x + 7^{\frac{1}{2}} x^{\frac{1}{2}})}^{\frac{1}{2}}$ with respect to $x$ is $\frac{d}{d x} [7 x] + \frac{d}{d x} [{(7 x + 7^{\frac{1}{2}} x^{\frac{1}{2}})}^{\frac{1}{2}}]$ .

$\frac{1}{2 {(7 x + {(7 x + 7^{\frac{1}{2}} x^{\frac{1}{2}})}^{\frac{1}{2}})}^{\frac{1}{2}}} (\frac{d}{d x} [7 x] + \frac{d}{d x} [{(7 x + 7^{\frac{1}{2}} x^{\frac{1}{2}})}^{\frac{1}{2}}])$

Step 7.4

Since $7$ is constant with respect to $x$ , the derivative of $7 x$ with respect to $x$ is $7 \frac{d}{d x} [x]$ .

$\frac{1}{2 {(7 x + {(7 x + 7^{\frac{1}{2}} x^{\frac{1}{2}})}^{\frac{1}{2}})}^{\frac{1}{2}}} (7 \frac{d}{d x} [x] + \frac{d}{d x} [{(7 x + 7^{\frac{1}{2}} x^{\frac{1}{2}})}^{\frac{1}{2}}])$

Step 7.5

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

$\frac{1}{2 {(7 x + {(7 x + 7^{\frac{1}{2}} x^{\frac{1}{2}})}^{\frac{1}{2}})}^{\frac{1}{2}}} (7 \cdot 1 + \frac{d}{d x} [{(7 x + 7^{\frac{1}{2}} x^{\frac{1}{2}})}^{\frac{1}{2}}])$

Step 7.6

Multiply $7$ by $1$ .

$\frac{1}{2 {(7 x + {(7 x + 7^{\frac{1}{2}} x^{\frac{1}{2}})}^{\frac{1}{2}})}^{\frac{1}{2}}} (7 + \frac{d}{d x} [{(7 x + 7^{\frac{1}{2}} x^{\frac{1}{2}})}^{\frac{1}{2}}])$

Step 8

Differentiate using the chain rule, which states that $\frac{d}{d x} [f (g (x))]$ is $f' (g (x)) g' (x)$ where $f (x) = x^{\frac{1}{2}}$ and $g (x) = 7 x + 7^{\frac{1}{2}} x^{\frac{1}{2}}$ .

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Step 8.1

To apply the Chain Rule, set $u_{2}$ as $7 x + 7^{\frac{1}{2}} x^{\frac{1}{2}}$ .

$\frac{1}{2 {(7 x + {(7 x + 7^{\frac{1}{2}} x^{\frac{1}{2}})}^{\frac{1}{2}})}^{\frac{1}{2}}} (7 + \frac{d}{d u_{2}} [{u_{2}}^{\frac{1}{2}}] \frac{d}{d x} [7 x + 7^{\frac{1}{2}} x^{\frac{1}{2}}])$

Step 8.2

Differentiate using the Power Rule which states that $\frac{d}{d u_{2}} [{u_{2}}^{n}]$ is $n {u_{2}}^{n - 1}$ where $n = \frac{1}{2}$ .

$\frac{1}{2 {(7 x + {(7 x + 7^{\frac{1}{2}} x^{\frac{1}{2}})}^{\frac{1}{2}})}^{\frac{1}{2}}} (7 + \frac{1}{2} {u_{2}}^{\frac{1}{2} - 1} \frac{d}{d x} [7 x + 7^{\frac{1}{2}} x^{\frac{1}{2}}])$

Step 8.3

Replace all occurrences of $u_{2}$ with $7 x + 7^{\frac{1}{2}} x^{\frac{1}{2}}$ .

$\frac{1}{2 {(7 x + {(7 x + 7^{\frac{1}{2}} x^{\frac{1}{2}})}^{\frac{1}{2}})}^{\frac{1}{2}}} (7 + \frac{1}{2} {(7 x + 7^{\frac{1}{2}} x^{\frac{1}{2}})}^{\frac{1}{2} - 1} \frac{d}{d x} [7 x + 7^{\frac{1}{2}} x^{\frac{1}{2}}])$

Step 9

To write $- 1$ as a fraction with a common denominator, multiply by $\frac{2}{2}$ .

$\frac{1}{2 {(7 x + {(7 x + 7^{\frac{1}{2}} x^{\frac{1}{2}})}^{\frac{1}{2}})}^{\frac{1}{2}}} (7 + \frac{1}{2} {(7 x + 7^{\frac{1}{2}} x^{\frac{1}{2}})}^{\frac{1}{2} - 1 \cdot \frac{2}{2}} \frac{d}{d x} [7 x + 7^{\frac{1}{2}} x^{\frac{1}{2}}])$

Step 10

Combine $- 1$ and $\frac{2}{2}$ .

$\frac{1}{2 {(7 x + {(7 x + 7^{\frac{1}{2}} x^{\frac{1}{2}})}^{\frac{1}{2}})}^{\frac{1}{2}}} (7 + \frac{1}{2} {(7 x + 7^{\frac{1}{2}} x^{\frac{1}{2}})}^{\frac{1}{2} + \frac{- 1 \cdot 2}{2}} \frac{d}{d x} [7 x + 7^{\frac{1}{2}} x^{\frac{1}{2}}])$

Step 11

Combine the numerators over the common denominator.

$\frac{1}{2 {(7 x + {(7 x + 7^{\frac{1}{2}} x^{\frac{1}{2}})}^{\frac{1}{2}})}^{\frac{1}{2}}} (7 + \frac{1}{2} {(7 x + 7^{\frac{1}{2}} x^{\frac{1}{2}})}^{\frac{1 - 1 \cdot 2}{2}} \frac{d}{d x} [7 x + 7^{\frac{1}{2}} x^{\frac{1}{2}}])$

Step 12

Simplify the numerator.

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Step 12.1

Multiply $- 1$ by $2$ .

$\frac{1}{2 {(7 x + {(7 x + 7^{\frac{1}{2}} x^{\frac{1}{2}})}^{\frac{1}{2}})}^{\frac{1}{2}}} (7 + \frac{1}{2} {(7 x + 7^{\frac{1}{2}} x^{\frac{1}{2}})}^{\frac{1 - 2}{2}} \frac{d}{d x} [7 x + 7^{\frac{1}{2}} x^{\frac{1}{2}}])$

Step 12.2

Subtract $2$ from $1$ .

$\frac{1}{2 {(7 x + {(7 x + 7^{\frac{1}{2}} x^{\frac{1}{2}})}^{\frac{1}{2}})}^{\frac{1}{2}}} (7 + \frac{1}{2} {(7 x + 7^{\frac{1}{2}} x^{\frac{1}{2}})}^{\frac{- 1}{2}} \frac{d}{d x} [7 x + 7^{\frac{1}{2}} x^{\frac{1}{2}}])$

Step 13

Combine fractions.

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Step 13.1

Move the negative in front of the fraction.

$\frac{1}{2 {(7 x + {(7 x + 7^{\frac{1}{2}} x^{\frac{1}{2}})}^{\frac{1}{2}})}^{\frac{1}{2}}} (7 + \frac{1}{2} {(7 x + 7^{\frac{1}{2}} x^{\frac{1}{2}})}^{- \frac{1}{2}} \frac{d}{d x} [7 x + 7^{\frac{1}{2}} x^{\frac{1}{2}}])$

Step 13.2

Combine $\frac{1}{2}$ and ${(7 x + 7^{\frac{1}{2}} x^{\frac{1}{2}})}^{- \frac{1}{2}}$ .

$\frac{1}{2 {(7 x + {(7 x + 7^{\frac{1}{2}} x^{\frac{1}{2}})}^{\frac{1}{2}})}^{\frac{1}{2}}} (7 + \frac{{(7 x + 7^{\frac{1}{2}} x^{\frac{1}{2}})}^{- \frac{1}{2}}}{2} \frac{d}{d x} [7 x + 7^{\frac{1}{2}} x^{\frac{1}{2}}])$

Step 13.3

Move ${(7 x + 7^{\frac{1}{2}} x^{\frac{1}{2}})}^{- \frac{1}{2}}$ to the denominator using the negative exponent rule $b^{- n} = \frac{1}{b^{n}}$ .

$\frac{1}{2 {(7 x + {(7 x + 7^{\frac{1}{2}} x^{\frac{1}{2}})}^{\frac{1}{2}})}^{\frac{1}{2}}} (7 + \frac{1}{2 {(7 x + 7^{\frac{1}{2}} x^{\frac{1}{2}})}^{\frac{1}{2}}} \frac{d}{d x} [7 x + 7^{\frac{1}{2}} x^{\frac{1}{2}}])$

Step 14

By the Sum Rule, the derivative of $7 x + 7^{\frac{1}{2}} x^{\frac{1}{2}}$ with respect to $x$ is $\frac{d}{d x} [7 x] + \frac{d}{d x} [7^{\frac{1}{2}} x^{\frac{1}{2}}]$ .

$\frac{1}{2 {(7 x + {(7 x + 7^{\frac{1}{2}} x^{\frac{1}{2}})}^{\frac{1}{2}})}^{\frac{1}{2}}} (7 + \frac{1}{2 {(7 x + 7^{\frac{1}{2}} x^{\frac{1}{2}})}^{\frac{1}{2}}} (\frac{d}{d x} [7 x] + \frac{d}{d x} [7^{\frac{1}{2}} x^{\frac{1}{2}}]))$

Step 15

Since $7$ is constant with respect to $x$ , the derivative of $7 x$ with respect to $x$ is $7 \frac{d}{d x} [x]$ .

$\frac{1}{2 {(7 x + {(7 x + 7^{\frac{1}{2}} x^{\frac{1}{2}})}^{\frac{1}{2}})}^{\frac{1}{2}}} (7 + \frac{1}{2 {(7 x + 7^{\frac{1}{2}} x^{\frac{1}{2}})}^{\frac{1}{2}}} (7 \frac{d}{d x} [x] + \frac{d}{d x} [7^{\frac{1}{2}} x^{\frac{1}{2}}]))$

Step 16

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

$\frac{1}{2 {(7 x + {(7 x + 7^{\frac{1}{2}} x^{\frac{1}{2}})}^{\frac{1}{2}})}^{\frac{1}{2}}} (7 + \frac{1}{2 {(7 x + 7^{\frac{1}{2}} x^{\frac{1}{2}})}^{\frac{1}{2}}} (7 \cdot 1 + \frac{d}{d x} [7^{\frac{1}{2}} x^{\frac{1}{2}}]))$

Step 17

Multiply $7$ by $1$ .

$\frac{1}{2 {(7 x + {(7 x + 7^{\frac{1}{2}} x^{\frac{1}{2}})}^{\frac{1}{2}})}^{\frac{1}{2}}} (7 + \frac{1}{2 {(7 x + 7^{\frac{1}{2}} x^{\frac{1}{2}})}^{\frac{1}{2}}} (7 + \frac{d}{d x} [7^{\frac{1}{2}} x^{\frac{1}{2}}]))$

Step 18

Since $7^{\frac{1}{2}}$ is constant with respect to $x$ , the derivative of $7^{\frac{1}{2}} x^{\frac{1}{2}}$ with respect to $x$ is $7^{\frac{1}{2}} \frac{d}{d x} [x^{\frac{1}{2}}]$ .

$\frac{1}{2 {(7 x + {(7 x + 7^{\frac{1}{2}} x^{\frac{1}{2}})}^{\frac{1}{2}})}^{\frac{1}{2}}} (7 + \frac{1}{2 {(7 x + 7^{\frac{1}{2}} x^{\frac{1}{2}})}^{\frac{1}{2}}} (7 + 7^{\frac{1}{2}} \frac{d}{d x} [x^{\frac{1}{2}}]))$

Step 19

Differentiate using the Power Rule which states that $\frac{d}{d x} [x^{n}]$ is $n x^{n - 1}$ where $n = \frac{1}{2}$ .

$\frac{1}{2 {(7 x + {(7 x + 7^{\frac{1}{2}} x^{\frac{1}{2}})}^{\frac{1}{2}})}^{\frac{1}{2}}} (7 + \frac{1}{2 {(7 x + 7^{\frac{1}{2}} x^{\frac{1}{2}})}^{\frac{1}{2}}} (7 + 7^{\frac{1}{2}} (\frac{1}{2} x^{\frac{1}{2} - 1})))$

Step 20

To write $- 1$ as a fraction with a common denominator, multiply by $\frac{2}{2}$ .

$\frac{1}{2 {(7 x + {(7 x + 7^{\frac{1}{2}} x^{\frac{1}{2}})}^{\frac{1}{2}})}^{\frac{1}{2}}} (7 + \frac{1}{2 {(7 x + 7^{\frac{1}{2}} x^{\frac{1}{2}})}^{\frac{1}{2}}} (7 + 7^{\frac{1}{2}} (\frac{1}{2} x^{\frac{1}{2} - 1 \cdot \frac{2}{2}})))$

Step 21

Combine $- 1$ and $\frac{2}{2}$ .

$\frac{1}{2 {(7 x + {(7 x + 7^{\frac{1}{2}} x^{\frac{1}{2}})}^{\frac{1}{2}})}^{\frac{1}{2}}} (7 + \frac{1}{2 {(7 x + 7^{\frac{1}{2}} x^{\frac{1}{2}})}^{\frac{1}{2}}} (7 + 7^{\frac{1}{2}} (\frac{1}{2} x^{\frac{1}{2} + \frac{- 1 \cdot 2}{2}})))$

Step 22

Combine the numerators over the common denominator.

$\frac{1}{2 {(7 x + {(7 x + 7^{\frac{1}{2}} x^{\frac{1}{2}})}^{\frac{1}{2}})}^{\frac{1}{2}}} (7 + \frac{1}{2 {(7 x + 7^{\frac{1}{2}} x^{\frac{1}{2}})}^{\frac{1}{2}}} (7 + 7^{\frac{1}{2}} (\frac{1}{2} x^{\frac{1 - 1 \cdot 2}{2}})))$

Step 23

Simplify the numerator.

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Step 23.1

Multiply $- 1$ by $2$ .

$\frac{1}{2 {(7 x + {(7 x + 7^{\frac{1}{2}} x^{\frac{1}{2}})}^{\frac{1}{2}})}^{\frac{1}{2}}} (7 + \frac{1}{2 {(7 x + 7^{\frac{1}{2}} x^{\frac{1}{2}})}^{\frac{1}{2}}} (7 + 7^{\frac{1}{2}} (\frac{1}{2} x^{\frac{1 - 2}{2}})))$

Step 23.2

Subtract $2$ from $1$ .

$\frac{1}{2 {(7 x + {(7 x + 7^{\frac{1}{2}} x^{\frac{1}{2}})}^{\frac{1}{2}})}^{\frac{1}{2}}} (7 + \frac{1}{2 {(7 x + 7^{\frac{1}{2}} x^{\frac{1}{2}})}^{\frac{1}{2}}} (7 + 7^{\frac{1}{2}} (\frac{1}{2} x^{\frac{- 1}{2}})))$

Step 24

Move the negative in front of the fraction.

$\frac{1}{2 {(7 x + {(7 x + 7^{\frac{1}{2}} x^{\frac{1}{2}})}^{\frac{1}{2}})}^{\frac{1}{2}}} (7 + \frac{1}{2 {(7 x + 7^{\frac{1}{2}} x^{\frac{1}{2}})}^{\frac{1}{2}}} (7 + 7^{\frac{1}{2}} (\frac{1}{2} x^{- \frac{1}{2}})))$

Step 25

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

Step 26

Combine $7^{\frac{1}{2}}$ and $\frac{x^{- \frac{1}{2}}}{2}$ .

Step 27

Simplify the expression.

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Step 27.1

Move $x^{- \frac{1}{2}}$ to the denominator using the negative exponent rule $b^{- n} = \frac{1}{b^{n}}$ .

Step 27.2

Reorder the factors of $\frac{1}{2 {(7 x + {(7 x + 7^{\frac{1}{2}} x^{\frac{1}{2}})}^{\frac{1}{2}})}^{\frac{1}{2}}} (7 + \frac{1}{2 {(7 x + 7^{\frac{1}{2}} x^{\frac{1}{2}})}^{\frac{1}{2}}} (7 + \frac{7^{\frac{1}{2}}}{2 x^{\frac{1}{2}}}))$ .

$(7 + \frac{1}{2 {(7 x + 7^{\frac{1}{2}} x^{\frac{1}{2}})}^{\frac{1}{2}}} (7 + \frac{7^{\frac{1}{2}}}{2 x^{\frac{1}{2}}})) \frac{1}{2 {(7 x + {(7 x + 7^{\frac{1}{2}} x^{\frac{1}{2}})}^{\frac{1}{2}})}^{\frac{1}{2}}}$