Calculus Examples

$\frac{x^{2} + 3 y^{2}}{e^{x^{2} + y^{2}}}$

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 $f (x) = x^{2} + 3 y^{2}$ and $g (x) = e^{x^{2} + y^{2}}$ .

$\frac{e^{x^{2} + y^{2}} \frac{d}{d x} [x^{2} + 3 y^{2}] - (x^{2} + 3 y^{2}) \frac{d}{d x} [e^{x^{2} + y^{2}}]}{{(e^{x^{2} + y^{2}})}^{2}}$

Step 2

Differentiate.

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Step 2.1

Multiply the exponents in ${(e^{x^{2} + y^{2}})}^{2}$ .

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Step 2.1.1

Apply the power rule and multiply exponents, ${(a^{m})}^{n} = a^{m n}$ .

$\frac{e^{x^{2} + y^{2}} \frac{d}{d x} [x^{2} + 3 y^{2}] - (x^{2} + 3 y^{2}) \frac{d}{d x} [e^{x^{2} + y^{2}}]}{e^{(x^{2} + y^{2}) \cdot 2}}$

Step 2.1.2

Apply the distributive property.

$\frac{e^{x^{2} + y^{2}} \frac{d}{d x} [x^{2} + 3 y^{2}] - (x^{2} + 3 y^{2}) \frac{d}{d x} [e^{x^{2} + y^{2}}]}{e^{x^{2} \cdot 2 + y^{2} \cdot 2}}$

Step 2.1.3

Move $2$ to the left of $x^{2}$ .

$\frac{e^{x^{2} + y^{2}} \frac{d}{d x} [x^{2} + 3 y^{2}] - (x^{2} + 3 y^{2}) \frac{d}{d x} [e^{x^{2} + y^{2}}]}{e^{2 \cdot x^{2} + y^{2} \cdot 2}}$

Step 2.1.4

Move $2$ to the left of $y^{2}$ .

$\frac{e^{x^{2} + y^{2}} \frac{d}{d x} [x^{2} + 3 y^{2}] - (x^{2} + 3 y^{2}) \frac{d}{d x} [e^{x^{2} + y^{2}}]}{e^{2 \cdot x^{2} + 2 \cdot y^{2}}}$

Step 2.1.5

Multiply $2$ by $y^{2}$ .

$\frac{e^{x^{2} + y^{2}} \frac{d}{d x} [x^{2} + 3 y^{2}] - (x^{2} + 3 y^{2}) \frac{d}{d x} [e^{x^{2} + y^{2}}]}{e^{2 x^{2} + 2 y^{2}}}$

Step 2.2

By the Sum Rule, the derivative of $x^{2} + 3 y^{2}$ with respect to $x$ is $\frac{d}{d x} [x^{2}] + \frac{d}{d x} [3 y^{2}]$ .

$\frac{e^{x^{2} + y^{2}} (\frac{d}{d x} [x^{2}] + \frac{d}{d x} [3 y^{2}]) - (x^{2} + 3 y^{2}) \frac{d}{d x} [e^{x^{2} + y^{2}}]}{e^{2 x^{2} + 2 y^{2}}}$

Step 2.3

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

$\frac{e^{x^{2} + y^{2}} (2 x + \frac{d}{d x} [3 y^{2}]) - (x^{2} + 3 y^{2}) \frac{d}{d x} [e^{x^{2} + y^{2}}]}{e^{2 x^{2} + 2 y^{2}}}$

Step 2.4

Since $3 y^{2}$ is constant with respect to $x$ , the derivative of $3 y^{2}$ with respect to $x$ is $0$ .

$\frac{e^{x^{2} + y^{2}} (2 x + 0) - (x^{2} + 3 y^{2}) \frac{d}{d x} [e^{x^{2} + y^{2}}]}{e^{2 x^{2} + 2 y^{2}}}$

Step 2.5

Add $2 x$ and $0$ .

$\frac{e^{x^{2} + y^{2}} (2 x) - (x^{2} + 3 y^{2}) \frac{d}{d x} [e^{x^{2} + y^{2}}]}{e^{2 x^{2} + 2 y^{2}}}$

Step 3

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

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Step 3.1

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

$\frac{e^{x^{2} + y^{2}} (2 x) - (x^{2} + 3 y^{2}) (\frac{d}{d u} [e^{u}] \frac{d}{d x} [x^{2} + y^{2}])}{e^{2 x^{2} + 2 y^{2}}}$

Step 3.2

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

$\frac{e^{x^{2} + y^{2}} (2 x) - (x^{2} + 3 y^{2}) (e^{u} \frac{d}{d x} [x^{2} + y^{2}])}{e^{2 x^{2} + 2 y^{2}}}$

Step 3.3

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

$\frac{e^{x^{2} + y^{2}} (2 x) - (x^{2} + 3 y^{2}) (e^{x^{2} + y^{2}} \frac{d}{d x} [x^{2} + y^{2}])}{e^{2 x^{2} + 2 y^{2}}}$

Step 4

Differentiate.

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Step 4.1

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

$\frac{e^{x^{2} + y^{2}} (2 x) - (x^{2} + 3 y^{2}) (e^{x^{2} + y^{2}} (\frac{d}{d x} [x^{2}] + \frac{d}{d x} [y^{2}]))}{e^{2 x^{2} + 2 y^{2}}}$

Step 4.2

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

$\frac{e^{x^{2} + y^{2}} (2 x) - (x^{2} + 3 y^{2}) (e^{x^{2} + y^{2}} (2 x + \frac{d}{d x} [y^{2}]))}{e^{2 x^{2} + 2 y^{2}}}$

Step 4.3

Since $y^{2}$ is constant with respect to $x$ , the derivative of $y^{2}$ with respect to $x$ is $0$ .

$\frac{e^{x^{2} + y^{2}} (2 x) - (x^{2} + 3 y^{2}) (e^{x^{2} + y^{2}} (2 x + 0))}{e^{2 x^{2} + 2 y^{2}}}$

Step 4.4

Simplify the expression.

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Step 4.4.1

Add $2 x$ and $0$ .

$\frac{e^{x^{2} + y^{2}} (2 x) - (x^{2} + 3 y^{2}) (e^{x^{2} + y^{2}} (2 x))}{e^{2 x^{2} + 2 y^{2}}}$

Step 4.4.2

Multiply $2$ by $- 1$ .

$\frac{e^{x^{2} + y^{2}} (2 x) - 2 (x^{2} + 3 y^{2}) (e^{x^{2} + y^{2}} (x))}{e^{2 x^{2} + 2 y^{2}}}$

Step 5

Simplify.

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Step 5.1

Apply the distributive property.

$\frac{e^{x^{2} + y^{2}} (2 x) + (- 2 x^{2} - 2 (3 y^{2})) (e^{x^{2} + y^{2}} (x))}{e^{2 x^{2} + 2 y^{2}}}$

Step 5.2

Simplify the numerator.

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Step 5.2.1

Simplify each term.

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Step 5.2.1.1

Rewrite using the commutative property of multiplication.

$\frac{2 e^{x^{2} + y^{2}} x + (- 2 x^{2} - 2 (3 y^{2})) (e^{x^{2} + y^{2}} (x))}{e^{2 x^{2} + 2 y^{2}}}$

Step 5.2.1.2

Multiply $3$ by $- 2$ .

$\frac{2 e^{x^{2} + y^{2}} x + (- 2 x^{2} - 6 y^{2}) (e^{x^{2} + y^{2}} (x))}{e^{2 x^{2} + 2 y^{2}}}$

Step 5.2.1.3

Apply the distributive property.

$\frac{2 e^{x^{2} + y^{2}} x - 2 x^{2} (e^{x^{2} + y^{2}} x) - 6 y^{2} (e^{x^{2} + y^{2}} x)}{e^{2 x^{2} + 2 y^{2}}}$

Step 5.2.1.4

Multiply $x^{2}$ by $x$ by adding the exponents.

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Step 5.2.1.4.1

Move $x$ .

$\frac{2 e^{x^{2} + y^{2}} x - 2 (x \cdot x^{2}) e^{x^{2} + y^{2}} - 6 y^{2} (e^{x^{2} + y^{2}} x)}{e^{2 x^{2} + 2 y^{2}}}$

Step 5.2.1.4.2

Multiply $x$ by $x^{2}$ .

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Step 5.2.1.4.2.1

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

$\frac{2 e^{x^{2} + y^{2}} x - 2 (x^{1} x^{2}) e^{x^{2} + y^{2}} - 6 y^{2} (e^{x^{2} + y^{2}} x)}{e^{2 x^{2} + 2 y^{2}}}$

Step 5.2.1.4.2.2

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

$\frac{2 e^{x^{2} + y^{2}} x - 2 x^{1 + 2} e^{x^{2} + y^{2}} - 6 y^{2} (e^{x^{2} + y^{2}} x)}{e^{2 x^{2} + 2 y^{2}}}$

Step 5.2.1.4.3

Add $1$ and $2$ .

$\frac{2 e^{x^{2} + y^{2}} x - 2 x^{3} e^{x^{2} + y^{2}} - 6 y^{2} (e^{x^{2} + y^{2}} x)}{e^{2 x^{2} + 2 y^{2}}}$

Step 5.2.2

Reorder factors in $2 e^{x^{2} + y^{2}} x - 2 x^{3} e^{x^{2} + y^{2}} - 6 y^{2} (e^{x^{2} + y^{2}} x)$ .

$\frac{2 x e^{x^{2} + y^{2}} - 2 x^{3} e^{x^{2} + y^{2}} - 6 y^{2} x e^{x^{2} + y^{2}}}{e^{2 x^{2} + 2 y^{2}}}$

Step 5.3

Reorder terms.

$\frac{2 e^{x^{2} + y^{2}} x - 2 e^{x^{2} + y^{2}} x^{3} - 6 e^{x^{2} + y^{2}} y^{2} x}{e^{2 x^{2} + 2 y^{2}}}$

Step 5.4

Factor $2 e^{x^{2} + y^{2}} x$ out of $2 e^{x^{2} + y^{2}} x - 2 e^{x^{2} + y^{2}} x^{3} - 6 e^{x^{2} + y^{2}} y^{2} x$ .

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Step 5.4.1

Factor $2 e^{x^{2} + y^{2}} x$ out of $2 e^{x^{2} + y^{2}} x$ .

$\frac{2 e^{x^{2} + y^{2}} x (1) - 2 e^{x^{2} + y^{2}} x^{3} - 6 e^{x^{2} + y^{2}} y^{2} x}{e^{2 x^{2} + 2 y^{2}}}$

Step 5.4.2

Factor $2 e^{x^{2} + y^{2}} x$ out of $- 2 e^{x^{2} + y^{2}} x^{3}$ .

$\frac{2 e^{x^{2} + y^{2}} x (1) + 2 e^{x^{2} + y^{2}} x (- x^{2}) - 6 e^{x^{2} + y^{2}} y^{2} x}{e^{2 x^{2} + 2 y^{2}}}$

Step 5.4.3

Factor $2 e^{x^{2} + y^{2}} x$ out of $- 6 e^{x^{2} + y^{2}} y^{2} x$ .

$\frac{2 e^{x^{2} + y^{2}} x (1) + 2 e^{x^{2} + y^{2}} x (- x^{2}) + 2 e^{x^{2} + y^{2}} x (- 3 y^{2})}{e^{2 x^{2} + 2 y^{2}}}$

Step 5.4.4

Factor $2 e^{x^{2} + y^{2}} x$ out of $2 e^{x^{2} + y^{2}} x (1) + 2 e^{x^{2} + y^{2}} x (- x^{2})$ .

$\frac{2 e^{x^{2} + y^{2}} x (1 - x^{2}) + 2 e^{x^{2} + y^{2}} x (- 3 y^{2})}{e^{2 x^{2} + 2 y^{2}}}$

Step 5.4.5

Factor $2 e^{x^{2} + y^{2}} x$ out of $2 e^{x^{2} + y^{2}} x (1 - x^{2}) + 2 e^{x^{2} + y^{2}} x (- 3 y^{2})$ .

$\frac{2 e^{x^{2} + y^{2}} x (1 - x^{2} - 3 y^{2})}{e^{2 x^{2} + 2 y^{2}}}$

Step 5.5

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

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Step 5.5.1

Factor $e^{2 x^{2} + 2 y^{2}}$ out of $2 e^{x^{2} + y^{2}} x (1 - x^{2} - 3 y^{2})$ .

$\frac{e^{2 x^{2} + 2 y^{2}} (2 e^{x^{2} + y^{2} - (2 x^{2} + 2 y^{2})} x (1 - x^{2} - 3 y^{2}))}{e^{2 x^{2} + 2 y^{2}}}$

Step 5.5.2

Cancel the common factors.

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Step 5.5.2.1

Multiply by $1$ .

$\frac{e^{2 x^{2} + 2 y^{2}} (2 e^{x^{2} + y^{2} - (2 x^{2} + 2 y^{2})} x (1 - x^{2} - 3 y^{2}))}{e^{2 x^{2} + 2 y^{2}} \cdot 1}$

Step 5.5.2.2

Cancel the common factor.

$\frac{e^{2 x^{2} + 2 y^{2}} (2 e^{x^{2} + y^{2} - (2 x^{2} + 2 y^{2})} x (1 - x^{2} - 3 y^{2}))}{e^{2 x^{2} + 2 y^{2}} \cdot 1}$

Step 5.5.2.3

Rewrite the expression.

$\frac{2 e^{x^{2} + y^{2} - (2 x^{2} + 2 y^{2})} x (1 - x^{2} - 3 y^{2})}{1}$

Step 5.5.2.4

Divide $2 e^{x^{2} + y^{2} - (2 x^{2} + 2 y^{2})} x (1 - x^{2} - 3 y^{2})$ by $1$ .

$2 e^{x^{2} + y^{2} - (2 x^{2} + 2 y^{2})} x (1 - x^{2} - 3 y^{2})$

Step 5.6

Simplify each term.

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Step 5.6.1

Apply the distributive property.

$2 e^{x^{2} + y^{2} - (2 x^{2}) - (2 y^{2})} x (1 - x^{2} - 3 y^{2})$

Step 5.6.2

Multiply $2$ by $- 1$ .

$2 e^{x^{2} + y^{2} - 2 x^{2} - (2 y^{2})} x (1 - x^{2} - 3 y^{2})$

Step 5.6.3

Multiply $2$ by $- 1$ .

$2 e^{x^{2} + y^{2} - 2 x^{2} - 2 y^{2}} x (1 - x^{2} - 3 y^{2})$

Step 5.7

Subtract $2 x^{2}$ from $x^{2}$ .

$2 e^{- x^{2} + y^{2} - 2 y^{2}} x (1 - x^{2} - 3 y^{2})$

Step 5.8

Subtract $2 y^{2}$ from $y^{2}$ .

$2 e^{- x^{2} - y^{2}} x (1 - x^{2} - 3 y^{2})$

Step 5.9

Apply the distributive property.

$2 e^{- x^{2} - y^{2}} x \cdot 1 + 2 e^{- x^{2} - y^{2}} x (- x^{2}) + 2 e^{- x^{2} - y^{2}} x (- 3 y^{2})$

Step 5.10

Simplify.

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Step 5.10.1

Multiply $2$ by $1$ .

$2 e^{- x^{2} - y^{2}} x + 2 e^{- x^{2} - y^{2}} x (- x^{2}) + 2 e^{- x^{2} - y^{2}} x (- 3 y^{2})$

Step 5.10.2

Multiply $x$ by $x^{2}$ by adding the exponents.

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Step 5.10.2.1

Move $x^{2}$ .

$2 e^{- x^{2} - y^{2}} x + 2 e^{- x^{2} - y^{2}} (x^{2} x) \cdot - 1 + 2 e^{- x^{2} - y^{2}} x (- 3 y^{2})$

Step 5.10.2.2

Multiply $x^{2}$ by $x$ .

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Step 5.10.2.2.1

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

$2 e^{- x^{2} - y^{2}} x + 2 e^{- x^{2} - y^{2}} (x^{2} x^{1}) \cdot - 1 + 2 e^{- x^{2} - y^{2}} x (- 3 y^{2})$

Step 5.10.2.2.2

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

$2 e^{- x^{2} - y^{2}} x + 2 e^{- x^{2} - y^{2}} x^{2 + 1} \cdot - 1 + 2 e^{- x^{2} - y^{2}} x (- 3 y^{2})$

Step 5.10.2.3

Add $2$ and $1$ .

$2 e^{- x^{2} - y^{2}} x + 2 e^{- x^{2} - y^{2}} x^{3} \cdot - 1 + 2 e^{- x^{2} - y^{2}} x (- 3 y^{2})$

Step 5.10.3

Multiply $- 3$ by $2$ .

$2 e^{- x^{2} - y^{2}} x + 2 e^{- x^{2} - y^{2}} x^{3} \cdot - 1 - 6 e^{- x^{2} - y^{2}} x y^{2}$

Step 5.11

Multiply $- 1$ by $2$ .

$2 e^{- x^{2} - y^{2}} x - 2 e^{- x^{2} - y^{2}} x^{3} - 6 e^{- x^{2} - y^{2}} x y^{2}$

Step 5.12

Reorder factors in $2 e^{- x^{2} - y^{2}} x - 2 e^{- x^{2} - y^{2}} x^{3} - 6 e^{- x^{2} - y^{2}} x y^{2}$ .

$2 x e^{- x^{2} - y^{2}} - 2 x^{3} e^{- x^{2} - y^{2}} - 6 x y^{2} e^{- x^{2} - y^{2}}$