Calculus Examples

$\frac{\ln (x^{2})}{x}$

Step 1

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 $f (x) = \ln (x^{2})$ and $g (x) = x$ .

$\frac{x \frac{d}{d x} [\ln (x^{2})] - \ln (x^{2}) \frac{d}{d x} [x]}{x^{2}}$

Step 2

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

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Step 2.1

To apply the Chain Rule, set $u$ as $x^{2}$ .

$\frac{x (\frac{d}{d u} [\ln (u)] \frac{d}{d x} [x^{2}]) - \ln (x^{2}) \frac{d}{d x} [x]}{x^{2}}$

Step 2.2

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

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

Step 2.3

Replace all occurrences of $u$ with $x^{2}$ .

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

Step 3

Differentiate using the Power Rule.

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Step 3.1

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

$\frac{\frac{x}{x^{2}} \frac{d}{d x} [x^{2}] - \ln (x^{2}) \frac{d}{d x} [x]}{x^{2}}$

Step 3.2

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

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Step 3.2.1

Raise $x$ to the power of $1$ .

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

Step 3.2.2

Factor $x$ out of $x^{1}$ .

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

Step 3.2.3

Cancel the common factors.

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Step 3.2.3.1

Factor $x$ out of $x^{2}$ .

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

Step 3.2.3.2

Cancel the common factor.

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

Step 3.2.3.3

Rewrite the expression.

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

Step 3.3

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

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

Step 3.4

Simplify terms.

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Step 3.4.1

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

$\frac{\frac{2}{x} x - \ln (x^{2}) \frac{d}{d x} [x]}{x^{2}}$

Step 3.4.2

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

$\frac{\frac{2 x}{x} - \ln (x^{2}) \frac{d}{d x} [x]}{x^{2}}$

Step 3.4.3

Cancel the common factor of $x$ .

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Step 3.4.3.1

Cancel the common factor.

$\frac{\frac{2 x}{x} - \ln (x^{2}) \frac{d}{d x} [x]}{x^{2}}$

Step 3.4.3.2

Divide $2$ by $1$ .

$\frac{2 - \ln (x^{2}) \frac{d}{d x} [x]}{x^{2}}$

Step 3.5

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

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

Step 3.6

Multiply $- 1$ by $1$ .

$\frac{2 - \ln (x^{2})}{x^{2}}$