Calculus Examples

$f (x) = \frac{\sqrt{9 - x^{2}}}{\ln (4 x + 1)}$

Step 1

Use $\sqrt[n]{a^{x}} = a^{\frac{x}{n}}$ to rewrite $\sqrt{9 - x^{2}}$ as ${(9 - x^{2})}^{\frac{1}{2}}$ .

$\frac{d}{d x} [\frac{{(9 - x^{2})}^{\frac{1}{2}}}{\ln (4 x + 1)}]$

Step 2

Differentiate using the Quotient Rule which states that $\frac{d}{d x} [\frac{f (x)}{g (x)}]$ is $\frac{g (x) \frac{d}{d x} [f (x)] - f (x) \frac{d}{d x} [g (x)]}{{g (x)}^{2}}$ where $f (x) = {(9 - x^{2})}^{\frac{1}{2}}$ and $g (x) = \ln (4 x + 1)$ .

$\frac{\ln (4 x + 1) \frac{d}{d x} [{(9 - x^{2})}^{\frac{1}{2}}] - {(9 - x^{2})}^{\frac{1}{2}} \frac{d}{d x} [\ln (4 x + 1)]}{\ln^{2} (4 x + 1)}$

Step 3

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 $g (x) = 9 - x^{2}$ .

Tap for more steps...

Step 3.1

To apply the Chain Rule, set $u_{1}$ as $9 - x^{2}$ .

$\frac{\ln (4 x + 1) (\frac{d}{d u_{1}} [{u_{1}}^{\frac{1}{2}}] \frac{d}{d x} [9 - x^{2}]) - {(9 - x^{2})}^{\frac{1}{2}} \frac{d}{d x} [\ln (4 x + 1)]}{\ln^{2} (4 x + 1)}$

Step 3.2

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

$\frac{\ln (4 x + 1) (\frac{1}{2} {u_{1}}^{\frac{1}{2} - 1} \frac{d}{d x} [9 - x^{2}]) - {(9 - x^{2})}^{\frac{1}{2}} \frac{d}{d x} [\ln (4 x + 1)]}{\ln^{2} (4 x + 1)}$

Step 3.3

Replace all occurrences of $u_{1}$ with $9 - x^{2}$ .

$\frac{\ln (4 x + 1) (\frac{1}{2} {(9 - x^{2})}^{\frac{1}{2} - 1} \frac{d}{d x} [9 - x^{2}]) - {(9 - x^{2})}^{\frac{1}{2}} \frac{d}{d x} [\ln (4 x + 1)]}{\ln^{2} (4 x + 1)}$

Step 4

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

$\frac{\ln (4 x + 1) (\frac{1}{2} {(9 - x^{2})}^{\frac{1}{2} - 1 \cdot \frac{2}{2}} \frac{d}{d x} [9 - x^{2}]) - {(9 - x^{2})}^{\frac{1}{2}} \frac{d}{d x} [\ln (4 x + 1)]}{\ln^{2} (4 x + 1)}$

Step 5

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

$\frac{\ln (4 x + 1) (\frac{1}{2} {(9 - x^{2})}^{\frac{1}{2} + \frac{- 1 \cdot 2}{2}} \frac{d}{d x} [9 - x^{2}]) - {(9 - x^{2})}^{\frac{1}{2}} \frac{d}{d x} [\ln (4 x + 1)]}{\ln^{2} (4 x + 1)}$

Step 6

Combine the numerators over the common denominator.

$\frac{\ln (4 x + 1) (\frac{1}{2} {(9 - x^{2})}^{\frac{1 - 1 \cdot 2}{2}} \frac{d}{d x} [9 - x^{2}]) - {(9 - x^{2})}^{\frac{1}{2}} \frac{d}{d x} [\ln (4 x + 1)]}{\ln^{2} (4 x + 1)}$

Step 7

Simplify the numerator.

Tap for more steps...

Step 7.1

Multiply $- 1$ by $2$ .

$\frac{\ln (4 x + 1) (\frac{1}{2} {(9 - x^{2})}^{\frac{1 - 2}{2}} \frac{d}{d x} [9 - x^{2}]) - {(9 - x^{2})}^{\frac{1}{2}} \frac{d}{d x} [\ln (4 x + 1)]}{\ln^{2} (4 x + 1)}$

Step 7.2

Subtract $2$ from $1$ .

$\frac{\ln (4 x + 1) (\frac{1}{2} {(9 - x^{2})}^{\frac{- 1}{2}} \frac{d}{d x} [9 - x^{2}]) - {(9 - x^{2})}^{\frac{1}{2}} \frac{d}{d x} [\ln (4 x + 1)]}{\ln^{2} (4 x + 1)}$

Step 8

Combine fractions.

Tap for more steps...

Step 8.1

Move the negative in front of the fraction.

$\frac{\ln (4 x + 1) (\frac{1}{2} {(9 - x^{2})}^{- \frac{1}{2}} \frac{d}{d x} [9 - x^{2}]) - {(9 - x^{2})}^{\frac{1}{2}} \frac{d}{d x} [\ln (4 x + 1)]}{\ln^{2} (4 x + 1)}$

Step 8.2

Combine $\frac{1}{2}$ and ${(9 - x^{2})}^{- \frac{1}{2}}$ .

$\frac{\ln (4 x + 1) (\frac{{(9 - x^{2})}^{- \frac{1}{2}}}{2} \frac{d}{d x} [9 - x^{2}]) - {(9 - x^{2})}^{\frac{1}{2}} \frac{d}{d x} [\ln (4 x + 1)]}{\ln^{2} (4 x + 1)}$

Step 8.3

Move ${(9 - x^{2})}^{- \frac{1}{2}}$ to the denominator using the negative exponent rule $b^{- n} = \frac{1}{b^{n}}$ .

$\frac{\ln (4 x + 1) (\frac{1}{2 {(9 - x^{2})}^{\frac{1}{2}}} \frac{d}{d x} [9 - x^{2}]) - {(9 - x^{2})}^{\frac{1}{2}} \frac{d}{d x} [\ln (4 x + 1)]}{\ln^{2} (4 x + 1)}$

Step 8.4

Combine $\frac{1}{2 {(9 - x^{2})}^{\frac{1}{2}}}$ and $\ln (4 x + 1)$ .

$\frac{\frac{\ln (4 x + 1)}{2 {(9 - x^{2})}^{\frac{1}{2}}} \frac{d}{d x} [9 - x^{2}] - {(9 - x^{2})}^{\frac{1}{2}} \frac{d}{d x} [\ln (4 x + 1)]}{\ln^{2} (4 x + 1)}$

Step 9

By the Sum Rule, the derivative of $9 - x^{2}$ with respect to $x$ is $\frac{d}{d x} [9] + \frac{d}{d x} [- x^{2}]$ .

$\frac{\frac{\ln (4 x + 1)}{2 {(9 - x^{2})}^{\frac{1}{2}}} (\frac{d}{d x} [9] + \frac{d}{d x} [- x^{2}]) - {(9 - x^{2})}^{\frac{1}{2}} \frac{d}{d x} [\ln (4 x + 1)]}{\ln^{2} (4 x + 1)}$

Step 10

Since $9$ is constant with respect to $x$ , the derivative of $9$ with respect to $x$ is $0$ .

$\frac{\frac{\ln (4 x + 1)}{2 {(9 - x^{2})}^{\frac{1}{2}}} (0 + \frac{d}{d x} [- x^{2}]) - {(9 - x^{2})}^{\frac{1}{2}} \frac{d}{d x} [\ln (4 x + 1)]}{\ln^{2} (4 x + 1)}$

Step 11

Add $0$ and $\frac{d}{d x} [- x^{2}]$ .

$\frac{\frac{\ln (4 x + 1)}{2 {(9 - x^{2})}^{\frac{1}{2}}} \frac{d}{d x} [- x^{2}] - {(9 - x^{2})}^{\frac{1}{2}} \frac{d}{d x} [\ln (4 x + 1)]}{\ln^{2} (4 x + 1)}$

Step 12

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

$\frac{\frac{\ln (4 x + 1)}{2 {(9 - x^{2})}^{\frac{1}{2}}} (- \frac{d}{d x} [x^{2}]) - {(9 - x^{2})}^{\frac{1}{2}} \frac{d}{d x} [\ln (4 x + 1)]}{\ln^{2} (4 x + 1)}$

Step 13

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

$\frac{\frac{\ln (4 x + 1)}{2 {(9 - x^{2})}^{\frac{1}{2}}} (- (2 x)) - {(9 - x^{2})}^{\frac{1}{2}} \frac{d}{d x} [\ln (4 x + 1)]}{\ln^{2} (4 x + 1)}$

Step 14

Simplify terms.

Tap for more steps...

Step 14.1

Multiply $2$ by $- 1$ .

$\frac{\frac{\ln (4 x + 1)}{2 {(9 - x^{2})}^{\frac{1}{2}}} (- 2 x) - {(9 - x^{2})}^{\frac{1}{2}} \frac{d}{d x} [\ln (4 x + 1)]}{\ln^{2} (4 x + 1)}$

Step 14.2

Combine $- 2$ and $\frac{\ln (4 x + 1)}{2 {(9 - x^{2})}^{\frac{1}{2}}}$ .

$\frac{\frac{- 2 \ln (4 x + 1)}{2 {(9 - x^{2})}^{\frac{1}{2}}} x - {(9 - x^{2})}^{\frac{1}{2}} \frac{d}{d x} [\ln (4 x + 1)]}{\ln^{2} (4 x + 1)}$

Step 14.3

Combine $\frac{- 2 \ln (4 x + 1)}{2 {(9 - x^{2})}^{\frac{1}{2}}}$ and $x$ .

$\frac{\frac{- 2 \ln (4 x + 1) x}{2 {(9 - x^{2})}^{\frac{1}{2}}} - {(9 - x^{2})}^{\frac{1}{2}} \frac{d}{d x} [\ln (4 x + 1)]}{\ln^{2} (4 x + 1)}$

Step 14.4

Factor $2$ out of $- 2 \ln (4 x + 1) x$ .

$\frac{\frac{2 (- \ln (4 x + 1) x)}{2 {(9 - x^{2})}^{\frac{1}{2}}} - {(9 - x^{2})}^{\frac{1}{2}} \frac{d}{d x} [\ln (4 x + 1)]}{\ln^{2} (4 x + 1)}$

Step 15

Cancel the common factors.

Tap for more steps...

Step 15.1

Factor $2$ out of $2 {(9 - x^{2})}^{\frac{1}{2}}$ .

$\frac{\frac{2 (- \ln (4 x + 1) x)}{2 ({(9 - x^{2})}^{\frac{1}{2}})} - {(9 - x^{2})}^{\frac{1}{2}} \frac{d}{d x} [\ln (4 x + 1)]}{\ln^{2} (4 x + 1)}$

Step 15.2

Cancel the common factor.

$\frac{\frac{2 (- \ln (4 x + 1) x)}{2 {(9 - x^{2})}^{\frac{1}{2}}} - {(9 - x^{2})}^{\frac{1}{2}} \frac{d}{d x} [\ln (4 x + 1)]}{\ln^{2} (4 x + 1)}$

Step 15.3

Rewrite the expression.

$\frac{\frac{- \ln (4 x + 1) x}{{(9 - x^{2})}^{\frac{1}{2}}} - {(9 - x^{2})}^{\frac{1}{2}} \frac{d}{d x} [\ln (4 x + 1)]}{\ln^{2} (4 x + 1)}$

Step 16

Move the negative in front of the fraction.

$\frac{- \frac{\ln (4 x + 1) x}{{(9 - x^{2})}^{\frac{1}{2}}} - {(9 - x^{2})}^{\frac{1}{2}} \frac{d}{d x} [\ln (4 x + 1)]}{\ln^{2} (4 x + 1)}$

Step 17

Differentiate using the chain rule, which states that $\frac{d}{d x} [f (g (x))]$ is $f' (g (x)) g' (x)$ where $f (x) = \ln (x)$ and $g (x) = 4 x + 1$ .

Tap for more steps...

Step 17.1

To apply the Chain Rule, set $u_{2}$ as $4 x + 1$ .

$\frac{- \frac{\ln (4 x + 1) x}{{(9 - x^{2})}^{\frac{1}{2}}} - {(9 - x^{2})}^{\frac{1}{2}} (\frac{d}{d u_{2}} [\ln (u_{2})] \frac{d}{d x} [4 x + 1])}{\ln^{2} (4 x + 1)}$

Step 17.2

The derivative of $\ln (u_{2})$ with respect to $u_{2}$ is $\frac{1}{u_{2}}$ .

$\frac{- \frac{\ln (4 x + 1) x}{{(9 - x^{2})}^{\frac{1}{2}}} - {(9 - x^{2})}^{\frac{1}{2}} (\frac{1}{u_{2}} \frac{d}{d x} [4 x + 1])}{\ln^{2} (4 x + 1)}$

Step 17.3

Replace all occurrences of $u_{2}$ with $4 x + 1$ .

$\frac{- \frac{\ln (4 x + 1) x}{{(9 - x^{2})}^{\frac{1}{2}}} - {(9 - x^{2})}^{\frac{1}{2}} (\frac{1}{4 x + 1} \frac{d}{d x} [4 x + 1])}{\ln^{2} (4 x + 1)}$

Step 18

Differentiate.

Tap for more steps...

Step 18.1

Combine $\frac{1}{4 x + 1}$ and ${(9 - x^{2})}^{\frac{1}{2}}$ .

$\frac{- \frac{\ln (4 x + 1) x}{{(9 - x^{2})}^{\frac{1}{2}}} - \frac{{(9 - x^{2})}^{\frac{1}{2}}}{4 x + 1} \frac{d}{d x} [4 x + 1]}{\ln^{2} (4 x + 1)}$

Step 18.2

By the Sum Rule, the derivative of $4 x + 1$ with respect to $x$ is $\frac{d}{d x} [4 x] + \frac{d}{d x} [1]$ .

$\frac{- \frac{\ln (4 x + 1) x}{{(9 - x^{2})}^{\frac{1}{2}}} - \frac{{(9 - x^{2})}^{\frac{1}{2}}}{4 x + 1} (\frac{d}{d x} [4 x] + \frac{d}{d x} [1])}{\ln^{2} (4 x + 1)}$

Step 18.3

Since $4$ is constant with respect to $x$ , the derivative of $4 x$ with respect to $x$ is $4 \frac{d}{d x} [x]$ .

$\frac{- \frac{\ln (4 x + 1) x}{{(9 - x^{2})}^{\frac{1}{2}}} - \frac{{(9 - x^{2})}^{\frac{1}{2}}}{4 x + 1} (4 \frac{d}{d x} [x] + \frac{d}{d x} [1])}{\ln^{2} (4 x + 1)}$

Step 18.4

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

$\frac{- \frac{\ln (4 x + 1) x}{{(9 - x^{2})}^{\frac{1}{2}}} - \frac{{(9 - x^{2})}^{\frac{1}{2}}}{4 x + 1} (4 \cdot 1 + \frac{d}{d x} [1])}{\ln^{2} (4 x + 1)}$

Step 18.5

Multiply $4$ by $1$ .

$\frac{- \frac{\ln (4 x + 1) x}{{(9 - x^{2})}^{\frac{1}{2}}} - \frac{{(9 - x^{2})}^{\frac{1}{2}}}{4 x + 1} (4 + \frac{d}{d x} [1])}{\ln^{2} (4 x + 1)}$

Step 18.6

Since $1$ is constant with respect to $x$ , the derivative of $1$ with respect to $x$ is $0$ .

$\frac{- \frac{\ln (4 x + 1) x}{{(9 - x^{2})}^{\frac{1}{2}}} - \frac{{(9 - x^{2})}^{\frac{1}{2}}}{4 x + 1} (4 + 0)}{\ln^{2} (4 x + 1)}$

Step 18.7

Combine fractions.

Tap for more steps...

Step 18.7.1

Add $4$ and $0$ .

$\frac{- \frac{\ln (4 x + 1) x}{{(9 - x^{2})}^{\frac{1}{2}}} - \frac{{(9 - x^{2})}^{\frac{1}{2}}}{4 x + 1} \cdot 4}{\ln^{2} (4 x + 1)}$

Step 18.7.2

Multiply $4$ by $- 1$ .

$\frac{- \frac{\ln (4 x + 1) x}{{(9 - x^{2})}^{\frac{1}{2}}} - 4 \frac{{(9 - x^{2})}^{\frac{1}{2}}}{4 x + 1}}{\ln^{2} (4 x + 1)}$

Step 18.7.3

Combine $- 4$ and $\frac{{(9 - x^{2})}^{\frac{1}{2}}}{4 x + 1}$ .

$\frac{- \frac{\ln (4 x + 1) x}{{(9 - x^{2})}^{\frac{1}{2}}} + \frac{- 4 {(9 - x^{2})}^{\frac{1}{2}}}{4 x + 1}}{\ln^{2} (4 x + 1)}$

Step 18.7.4

Move the negative in front of the fraction.

$\frac{- \frac{\ln (4 x + 1) x}{{(9 - x^{2})}^{\frac{1}{2}}} - \frac{4 {(9 - x^{2})}^{\frac{1}{2}}}{4 x + 1}}{\ln^{2} (4 x + 1)}$

Step 19

To write $- \frac{\ln (4 x + 1) x}{{(9 - x^{2})}^{\frac{1}{2}}}$ as a fraction with a common denominator, multiply by $\frac{4 x + 1}{4 x + 1}$ .

$\frac{- \frac{\ln (4 x + 1) x}{{(9 - x^{2})}^{\frac{1}{2}}} \cdot \frac{4 x + 1}{4 x + 1} - \frac{4 {(9 - x^{2})}^{\frac{1}{2}}}{4 x + 1}}{\ln^{2} (4 x + 1)}$

Step 20

To write $- \frac{4 {(9 - x^{2})}^{\frac{1}{2}}}{4 x + 1}$ as a fraction with a common denominator, multiply by $\frac{{(9 - x^{2})}^{\frac{1}{2}}}{{(9 - x^{2})}^{\frac{1}{2}}}$ .

$\frac{- \frac{\ln (4 x + 1) x}{{(9 - x^{2})}^{\frac{1}{2}}} \cdot \frac{4 x + 1}{4 x + 1} - \frac{4 {(9 - x^{2})}^{\frac{1}{2}}}{4 x + 1} \cdot \frac{{(9 - x^{2})}^{\frac{1}{2}}}{{(9 - x^{2})}^{\frac{1}{2}}}}{\ln^{2} (4 x + 1)}$

Step 21

Write each expression with a common denominator of $(4 x + 1) {(9 - x^{2})}^{\frac{1}{2}}$ , by multiplying each by an appropriate factor of $1$ .

Tap for more steps...

Step 21.1

Multiply $\frac{\ln (4 x + 1) x}{{(9 - x^{2})}^{\frac{1}{2}}}$ by $\frac{4 x + 1}{4 x + 1}$ .

$\frac{- \frac{\ln (4 x + 1) x (4 x + 1)}{{(9 - x^{2})}^{\frac{1}{2}} (4 x + 1)} - \frac{4 {(9 - x^{2})}^{\frac{1}{2}}}{4 x + 1} \cdot \frac{{(9 - x^{2})}^{\frac{1}{2}}}{{(9 - x^{2})}^{\frac{1}{2}}}}{\ln^{2} (4 x + 1)}$

Step 21.2

Multiply $\frac{4 {(9 - x^{2})}^{\frac{1}{2}}}{4 x + 1}$ by $\frac{{(9 - x^{2})}^{\frac{1}{2}}}{{(9 - x^{2})}^{\frac{1}{2}}}$ .

$\frac{- \frac{\ln (4 x + 1) x (4 x + 1)}{{(9 - x^{2})}^{\frac{1}{2}} (4 x + 1)} - \frac{4 {(9 - x^{2})}^{\frac{1}{2}} {(9 - x^{2})}^{\frac{1}{2}}}{(4 x + 1) {(9 - x^{2})}^{\frac{1}{2}}}}{\ln^{2} (4 x + 1)}$

Step 21.3

Reorder the factors of $(4 x + 1) {(9 - x^{2})}^{\frac{1}{2}}$ .

$\frac{- \frac{\ln (4 x + 1) x (4 x + 1)}{{(9 - x^{2})}^{\frac{1}{2}} (4 x + 1)} - \frac{4 {(9 - x^{2})}^{\frac{1}{2}} {(9 - x^{2})}^{\frac{1}{2}}}{{(9 - x^{2})}^{\frac{1}{2}} (4 x + 1)}}{\ln^{2} (4 x + 1)}$

Step 22

Combine the numerators over the common denominator.

$\frac{\frac{- \ln (4 x + 1) x (4 x + 1) - 4 {(9 - x^{2})}^{\frac{1}{2}} {(9 - x^{2})}^{\frac{1}{2}}}{{(9 - x^{2})}^{\frac{1}{2}} (4 x + 1)}}{\ln^{2} (4 x + 1)}$

Step 23

Multiply ${(9 - x^{2})}^{\frac{1}{2}}$ by ${(9 - x^{2})}^{\frac{1}{2}}$ by adding the exponents.

Tap for more steps...

Step 23.1

Move ${(9 - x^{2})}^{\frac{1}{2}}$ .

$\frac{\frac{- \ln (4 x + 1) x (4 x + 1) - 4 ({(9 - x^{2})}^{\frac{1}{2}} {(9 - x^{2})}^{\frac{1}{2}})}{{(9 - x^{2})}^{\frac{1}{2}} (4 x + 1)}}{\ln^{2} (4 x + 1)}$

Step 23.2

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$\frac{\frac{- \ln (4 x + 1) x (4 x + 1) - 4 {(9 - x^{2})}^{\frac{1}{2} + \frac{1}{2}}}{{(9 - x^{2})}^{\frac{1}{2}} (4 x + 1)}}{\ln^{2} (4 x + 1)}$

Step 23.3

Combine the numerators over the common denominator.

$\frac{\frac{- \ln (4 x + 1) x (4 x + 1) - 4 {(9 - x^{2})}^{\frac{1 + 1}{2}}}{{(9 - x^{2})}^{\frac{1}{2}} (4 x + 1)}}{\ln^{2} (4 x + 1)}$

Step 23.4

Add $1$ and $1$ .

$\frac{\frac{- \ln (4 x + 1) x (4 x + 1) - 4 {(9 - x^{2})}^{\frac{2}{2}}}{{(9 - x^{2})}^{\frac{1}{2}} (4 x + 1)}}{\ln^{2} (4 x + 1)}$

Step 23.5

Divide $2$ by $2$ .

$\frac{\frac{- \ln (4 x + 1) x (4 x + 1) - 4 {(9 - x^{2})}^{1}}{{(9 - x^{2})}^{\frac{1}{2}} (4 x + 1)}}{\ln^{2} (4 x + 1)}$

Step 24

Simplify $- 4 {(9 - x^{2})}^{1}$ .

$\frac{\frac{- \ln (4 x + 1) x (4 x + 1) - 4 (9 - x^{2})}{{(9 - x^{2})}^{\frac{1}{2}} (4 x + 1)}}{\ln^{2} (4 x + 1)}$

Step 25

Rewrite $\frac{\frac{- \ln (4 x + 1) x (4 x + 1) - 4 (9 - x^{2})}{{(9 - x^{2})}^{\frac{1}{2}} (4 x + 1)}}{\ln^{2} (4 x + 1)}$ as a product.

$\frac{- \ln (4 x + 1) x (4 x + 1) - 4 (9 - x^{2})}{{(9 - x^{2})}^{\frac{1}{2}} (4 x + 1)} \cdot \frac{1}{\ln^{2} (4 x + 1)}$

Step 26

Multiply $\frac{- \ln (4 x + 1) x (4 x + 1) - 4 (9 - x^{2})}{{(9 - x^{2})}^{\frac{1}{2}} (4 x + 1)}$ by $\frac{1}{\ln^{2} (4 x + 1)}$ .

$\frac{- \ln (4 x + 1) x (4 x + 1) - 4 (9 - x^{2})}{{(9 - x^{2})}^{\frac{1}{2}} (4 x + 1) \ln^{2} (4 x + 1)}$

Step 27

Simplify.

Tap for more steps...

Step 27.1

Apply the distributive property.

$\frac{- \ln (4 x + 1) x (4 x + 1) - 4 \cdot 9 - 4 (- x^{2})}{{(9 - x^{2})}^{\frac{1}{2}} (4 x + 1) \ln^{2} (4 x + 1)}$

Step 27.2

Simplify the numerator.

Tap for more steps...

Step 27.2.1

Simplify each term.

Tap for more steps...

Step 27.2.1.1

Apply the distributive property.

$\frac{- \ln (4 x + 1) x (4 x) - \ln (4 x + 1) x \cdot 1 - 4 \cdot 9 - 4 (- x^{2})}{{(9 - x^{2})}^{\frac{1}{2}} (4 x + 1) \ln^{2} (4 x + 1)}$

Step 27.2.1.2

Multiply $x$ by $x$ by adding the exponents.

Tap for more steps...

Step 27.2.1.2.1

Move $x$ .

$\frac{- \ln (4 x + 1) (x \cdot x) \cdot 4 - \ln (4 x + 1) x \cdot 1 - 4 \cdot 9 - 4 (- x^{2})}{{(9 - x^{2})}^{\frac{1}{2}} (4 x + 1) \ln^{2} (4 x + 1)}$

Step 27.2.1.2.2

Multiply $x$ by $x$ .

$\frac{- \ln (4 x + 1) x^{2} \cdot 4 - \ln (4 x + 1) x \cdot 1 - 4 \cdot 9 - 4 (- x^{2})}{{(9 - x^{2})}^{\frac{1}{2}} (4 x + 1) \ln^{2} (4 x + 1)}$

Step 27.2.1.3

Multiply $- 1$ by $1$ .

$\frac{- \ln (4 x + 1) x^{2} \cdot 4 - \ln (4 x + 1) x - 4 \cdot 9 - 4 (- x^{2})}{{(9 - x^{2})}^{\frac{1}{2}} (4 x + 1) \ln^{2} (4 x + 1)}$

Step 27.2.1.4

Multiply $- \ln (4 x + 1) x^{2} \cdot 4$ .

Tap for more steps...

Step 27.2.1.4.1

Multiply $4$ by $- 1$ .

$\frac{- 4 \ln (4 x + 1) x^{2} - \ln (4 x + 1) x - 4 \cdot 9 - 4 (- x^{2})}{{(9 - x^{2})}^{\frac{1}{2}} (4 x + 1) \ln^{2} (4 x + 1)}$

Step 27.2.1.4.2

Simplify $- 4 \ln (4 x + 1)$ by moving $4$ inside the logarithm.

$\frac{- \ln ({(4 x + 1)}^{4}) x^{2} - \ln (4 x + 1) x - 4 \cdot 9 - 4 (- x^{2})}{{(9 - x^{2})}^{\frac{1}{2}} (4 x + 1) \ln^{2} (4 x + 1)}$

Step 27.2.1.5

Multiply $- 4$ by $9$ .

$\frac{- \ln ({(4 x + 1)}^{4}) x^{2} - \ln (4 x + 1) x - 36 - 4 (- x^{2})}{{(9 - x^{2})}^{\frac{1}{2}} (4 x + 1) \ln^{2} (4 x + 1)}$

Step 27.2.1.6

Multiply $- 1$ by $- 4$ .

$\frac{- \ln ({(4 x + 1)}^{4}) x^{2} - \ln (4 x + 1) x - 36 + 4 x^{2}}{{(9 - x^{2})}^{\frac{1}{2}} (4 x + 1) \ln^{2} (4 x + 1)}$

Step 27.2.2

Reorder factors in $- \ln ({(4 x + 1)}^{4}) x^{2} - \ln (4 x + 1) x - 36 + 4 x^{2}$ .

$\frac{- x^{2} \ln ({(4 x + 1)}^{4}) - x \ln (4 x + 1) - 36 + 4 x^{2}}{{(9 - x^{2})}^{\frac{1}{2}} (4 x + 1) \ln^{2} (4 x + 1)}$

Step 27.3

Reorder terms.

$\frac{4 x^{2} - x^{2} \ln ({(4 x + 1)}^{4}) - x \ln (4 x + 1) - 36}{{(9 - x^{2})}^{\frac{1}{2}} \ln^{2} (4 x + 1) (4 x + 1)}$