Calculus Examples

$y = x^{x^{x}}$

Step 1

Differentiate both sides of the equation.

$\frac{d}{d x} (y) = \frac{d}{d x} (x^{x^{x}})$

Step 2

The derivative of $y$ with respect to $x$ is $y'$ .

$y'$

Step 3

Differentiate the right side of the equation.

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Step 3.1

Use the properties of logarithms to simplify the differentiation.

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Step 3.1.1

Rewrite $x^{x^{x}}$ as $e^{\ln (x^{x^{x}})}$ .

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

Step 3.1.2

Expand $\ln (x^{x^{x}})$ by moving $x^{x}$ outside the logarithm.

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

Step 3.2

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

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Step 3.2.1

To apply the Chain Rule, set $u_{1}$ as $x^{x} \ln (x)$ .

$\frac{d}{d u_{1}} [e^{u_{1}}] \frac{d}{d x} [x^{x} \ln (x)]$

Step 3.2.2

Differentiate using the Exponential Rule which states that $\frac{d}{d u_{1}} [a^{u_{1}}]$ is $a^{u_{1}} \ln (a)$ where $a$ = $e$ .

$e^{u_{1}} \frac{d}{d x} [x^{x} \ln (x)]$

Step 3.2.3

Replace all occurrences of $u_{1}$ with $x^{x} \ln (x)$ .

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

Step 3.3

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

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

Step 3.4

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

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

Step 3.5

Simplify terms.

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Step 3.5.1

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

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

Step 3.5.2

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

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Step 3.5.2.1

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

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

Step 3.5.2.2

Cancel the common factors.

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Step 3.5.2.2.1

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

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

Step 3.5.2.2.2

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

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

Step 3.5.2.2.3

Cancel the common factor.

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

Step 3.5.2.2.4

Rewrite the expression.

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

Step 3.5.2.2.5

Divide $x^{x - 1}$ by $1$ .

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

Step 3.6

Use the properties of logarithms to simplify the differentiation.

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Step 3.6.1

Rewrite $x^{x}$ as $e^{\ln (x^{x})}$ .

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

Step 3.6.2

Expand $\ln (x^{x})$ by moving $x$ outside the logarithm.

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

Step 3.7

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

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Step 3.7.1

To apply the Chain Rule, set $u_{2}$ as $x \ln (x)$ .

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

Step 3.7.2

Differentiate using the Exponential Rule which states that $\frac{d}{d u_{2}} [a^{u_{2}}]$ is $a^{u_{2}} \ln (a)$ where $a$ = $e$ .

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

Step 3.7.3

Replace all occurrences of $u_{2}$ with $x \ln (x)$ .

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

Step 3.8

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 $g (x) = \ln (x)$ .

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

Step 3.9

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

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

Step 3.10

Differentiate using the Power Rule.

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Step 3.10.1

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

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

Step 3.10.2

Cancel the common factor of $x$ .

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Step 3.10.2.1

Cancel the common factor.

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

Step 3.10.2.2

Rewrite the expression.

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

Step 3.10.3

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

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

Step 3.10.4

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

$e^{x^{x} \ln (x)} (x^{x - 1} + \ln (x) (e^{x \ln (x)} (1 + \ln (x))))$

Step 3.11

Simplify.

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Step 3.11.1

Apply the distributive property.

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

Step 3.11.2

Apply the distributive property.

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

Step 3.11.3

Apply the distributive property.

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

Step 3.11.4

Combine terms.

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Step 3.11.4.1

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

$e^{x^{x} \ln (x)} x^{x - 1} + e^{x^{x} \ln (x)} (\ln (x) e^{x \ln (x)}) + e^{x^{x} \ln (x)} (\ln (x) (e^{x \ln (x)} \ln (x)))$

Step 3.11.4.2

Multiply $e^{x^{x} \ln (x)}$ by $e^{x \ln (x)}$ by adding the exponents.

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Step 3.11.4.2.1

Move $e^{x \ln (x)}$ .

$e^{x^{x} \ln (x)} x^{x - 1} + e^{x \ln (x)} e^{x^{x} \ln (x)} \ln (x) + e^{x^{x} \ln (x)} (\ln (x) (e^{x \ln (x)} \ln (x)))$

Step 3.11.4.2.2

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

$e^{x^{x} \ln (x)} x^{x - 1} + e^{x \ln (x) + x^{x} \ln (x)} \ln (x) + e^{x^{x} \ln (x)} (\ln (x) (e^{x \ln (x)} \ln (x)))$

Step 3.11.4.3

Raise $\ln (x)$ to the power of $1$ .

$e^{x^{x} \ln (x)} x^{x - 1} + e^{x \ln (x) + x^{x} \ln (x)} \ln (x) + e^{x^{x} \ln (x)} (\ln^{1} (x) \ln (x) e^{x \ln (x)})$

Step 3.11.4.4

Raise $\ln (x)$ to the power of $1$ .

$e^{x^{x} \ln (x)} x^{x - 1} + e^{x \ln (x) + x^{x} \ln (x)} \ln (x) + e^{x^{x} \ln (x)} (\ln^{1} (x) \ln^{1} (x) e^{x \ln (x)})$

Step 3.11.4.5

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

$e^{x^{x} \ln (x)} x^{x - 1} + e^{x \ln (x) + x^{x} \ln (x)} \ln (x) + e^{x^{x} \ln (x)} ({\ln (x)}^{1 + 1} e^{x \ln (x)})$

Step 3.11.4.6

Add $1$ and $1$ .

$e^{x^{x} \ln (x)} x^{x - 1} + e^{x \ln (x) + x^{x} \ln (x)} \ln (x) + e^{x^{x} \ln (x)} (\ln^{2} (x) e^{x \ln (x)})$

Step 3.11.4.7

Multiply $e^{x^{x} \ln (x)}$ by $e^{x \ln (x)}$ by adding the exponents.

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Step 3.11.4.7.1

Move $e^{x \ln (x)}$ .

$e^{x^{x} \ln (x)} x^{x - 1} + e^{x \ln (x) + x^{x} \ln (x)} \ln (x) + e^{x \ln (x)} e^{x^{x} \ln (x)} \ln^{2} (x)$

Step 3.11.4.7.2

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

$e^{x^{x} \ln (x)} x^{x - 1} + e^{x \ln (x) + x^{x} \ln (x)} \ln (x) + e^{x \ln (x) + x^{x} \ln (x)} \ln^{2} (x)$

Step 4

Reform the equation by setting the left side equal to the right side.

$y' = e^{x^{x} \ln (x)} x^{x - 1} + e^{x \ln (x) + x^{x} \ln (x)} \ln (x) + e^{x \ln (x) + x^{x} \ln (x)} \ln^{2} (x)$

Step 5

Replace $y'$ with $\frac{d y}{d x}$ .

$\frac{d y}{d x} = e^{x^{x} \ln (x)} x^{x - 1} + e^{x \ln (x) + x^{x} \ln (x)} \ln (x) + e^{x \ln (x) + x^{x} \ln (x)} \ln^{2} (x)$