Calculus Examples

$y = 3^{x \ln (x)}$

Step 1

Differentiate using the chain rule, which states that $\frac{d}{d x} [f (g (x))]$ is $f' (g (x)) g' (x)$ where $f (x) = 3^{x}$ and $g (x) = x \ln (x)$ .

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Step 1.1

To apply the Chain Rule, set $u$ as $x \ln (x)$ .

$\frac{d}{d u} [3^{u}] \frac{d}{d x} [x \ln (x)]$

Step 1.2

Differentiate using the Exponential Rule which states that $\frac{d}{d u} [a^{u}]$ is $a^{u} \ln (a)$ where $a$ = $3$ .

$3^{u} \ln (3) \frac{d}{d x} [x \ln (x)]$

Step 1.3

Replace all occurrences of $u$ with $x \ln (x)$ .

$3^{x \ln (x)} \ln (3) \frac{d}{d x} [x \ln (x)]$

Step 2

Differentiate using the Product Rule which states that $\frac{d}{d x} [f (x) g (x)]$ is $f (x) \frac{d}{d x} [g (x)] + g (x) \frac{d}{d x} [f (x)]$ where $f (x) = x$ and $g (x) = \ln (x)$ .

$3^{x \ln (x)} \ln (3) (x \frac{d}{d x} [\ln (x)] + \ln (x) \frac{d}{d x} [x])$

Step 3

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

$3^{x \ln (x)} \ln (3) (x \frac{1}{x} + \ln (x) \frac{d}{d x} [x])$

Step 4

Differentiate using the Power Rule.

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Step 4.1

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

$3^{x \ln (x)} \ln (3) (\frac{x}{x} + \ln (x) \frac{d}{d x} [x])$

Step 4.2

Cancel the common factor of $x$ .

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Step 4.2.1

Cancel the common factor.

$3^{x \ln (x)} \ln (3) (\frac{x}{x} + \ln (x) \frac{d}{d x} [x])$

Step 4.2.2

Rewrite the expression.

$3^{x \ln (x)} \ln (3) (1 + \ln (x) \frac{d}{d x} [x])$

Step 4.3

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

$3^{x \ln (x)} \ln (3) (1 + \ln (x) \cdot 1)$

Step 4.4

Multiply $\ln (x)$ by $1$ .

$3^{x \ln (x)} \ln (3) (1 + \ln (x))$

Step 5

Simplify.

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Step 5.1

Apply the distributive property.

$3^{x \ln (x)} \ln (3) \cdot 1 + 3^{x \ln (x)} \ln (3) \ln (x)$

Step 5.2

Multiply $3^{x \ln (x)}$ by $1$ .

$3^{x \ln (x)} \ln (3) + 3^{x \ln (x)} \ln (3) \ln (x)$