Calculus Examples

$\frac{3 x e^{x^{2}} + 8}{y}$

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 $f (x) = 3 x e^{x^{2}} + 8$ and $g (x) = y$ .

$\frac{y \frac{d}{d x} [3 x e^{x^{2}} + 8] - (3 x e^{x^{2}} + 8) \frac{d}{d x} [y]}{y^{2}}$

Step 2

By the Sum Rule, the derivative of $3 x e^{x^{2}} + 8$ with respect to $x$ is $\frac{d}{d x} [3 x e^{x^{2}}] + \frac{d}{d x} [8]$ .

$\frac{y (\frac{d}{d x} [3 x e^{x^{2}}] + \frac{d}{d x} [8]) - (3 x e^{x^{2}} + 8) \frac{d}{d x} [y]}{y^{2}}$

Step 3

Evaluate $\frac{d}{d x} [3 x e^{x^{2}}]$ .

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Step 3.1

Since $3$ is constant with respect to $x$ , the derivative of $3 x e^{x^{2}}$ with respect to $x$ is $3 \frac{d}{d x} [x e^{x^{2}}]$ .

$\frac{y (3 \frac{d}{d x} [x e^{x^{2}}] + \frac{d}{d x} [8]) - (3 x e^{x^{2}} + 8) \frac{d}{d x} [y]}{y^{2}}$

Step 3.2

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 $g (x) = e^{x^{2}}$ .

$\frac{y (3 (x \frac{d}{d x} [e^{x^{2}}] + e^{x^{2}} \frac{d}{d x} [x]) + \frac{d}{d x} [8]) - (3 x e^{x^{2}} + 8) \frac{d}{d x} [y]}{y^{2}}$

Step 3.3

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

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Step 3.3.1

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

$\frac{y (3 (x (\frac{d}{d u} [e^{u}] \frac{d}{d x} [x^{2}]) + e^{x^{2}} \frac{d}{d x} [x]) + \frac{d}{d x} [8]) - (3 x e^{x^{2}} + 8) \frac{d}{d x} [y]}{y^{2}}$

Step 3.3.2

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

$\frac{y (3 (x (e^{u} \frac{d}{d x} [x^{2}]) + e^{x^{2}} \frac{d}{d x} [x]) + \frac{d}{d x} [8]) - (3 x e^{x^{2}} + 8) \frac{d}{d x} [y]}{y^{2}}$

Step 3.3.3

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

$\frac{y (3 (x (e^{x^{2}} \frac{d}{d x} [x^{2}]) + e^{x^{2}} \frac{d}{d x} [x]) + \frac{d}{d x} [8]) - (3 x e^{x^{2}} + 8) \frac{d}{d x} [y]}{y^{2}}$

Step 3.4

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

$\frac{y (3 (x (e^{x^{2}} (2 x)) + e^{x^{2}} \frac{d}{d x} [x]) + \frac{d}{d x} [8]) - (3 x e^{x^{2}} + 8) \frac{d}{d x} [y]}{y^{2}}$

Step 3.5

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

$\frac{y (3 (x (e^{x^{2}} (2 x)) + e^{x^{2}} \cdot 1) + \frac{d}{d x} [8]) - (3 x e^{x^{2}} + 8) \frac{d}{d x} [y]}{y^{2}}$

Step 3.6

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

$\frac{y (3 (x^{1} x (e^{x^{2}} \cdot (2)) + e^{x^{2}} \cdot 1) + \frac{d}{d x} [8]) - (3 x e^{x^{2}} + 8) \frac{d}{d x} [y]}{y^{2}}$

Step 3.7

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

$\frac{y (3 (x^{1} x^{1} (e^{x^{2}} \cdot (2)) + e^{x^{2}} \cdot 1) + \frac{d}{d x} [8]) - (3 x e^{x^{2}} + 8) \frac{d}{d x} [y]}{y^{2}}$

Step 3.8

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

$\frac{y (3 (x^{1 + 1} (e^{x^{2}} \cdot (2)) + e^{x^{2}} \cdot 1) + \frac{d}{d x} [8]) - (3 x e^{x^{2}} + 8) \frac{d}{d x} [y]}{y^{2}}$

Step 3.9

Add $1$ and $1$ .

$\frac{y (3 (x^{2} (e^{x^{2}} \cdot (2)) + e^{x^{2}} \cdot 1) + \frac{d}{d x} [8]) - (3 x e^{x^{2}} + 8) \frac{d}{d x} [y]}{y^{2}}$

Step 3.10

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

$\frac{y (3 (x^{2} (2 \cdot e^{x^{2}}) + e^{x^{2}} \cdot 1) + \frac{d}{d x} [8]) - (3 x e^{x^{2}} + 8) \frac{d}{d x} [y]}{y^{2}}$

Step 3.11

Multiply $e^{x^{2}}$ by $1$ .

$\frac{y (3 (x^{2} (2 e^{x^{2}}) + e^{x^{2}}) + \frac{d}{d x} [8]) - (3 x e^{x^{2}} + 8) \frac{d}{d x} [y]}{y^{2}}$

Step 4

Since $8$ is constant with respect to $x$ , the derivative of $8$ with respect to $x$ is $0$ .

$\frac{y (3 (x^{2} (2 e^{x^{2}}) + e^{x^{2}}) + 0) - (3 x e^{x^{2}} + 8) \frac{d}{d x} [y]}{y^{2}}$

Step 5

Simplify.

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Step 5.1

Apply the distributive property.

$\frac{y (3 (x^{2} (2 e^{x^{2}})) + 3 e^{x^{2}} + 0) - (3 x e^{x^{2}} + 8) \frac{d}{d x} [y]}{y^{2}}$

Step 5.2

Combine terms.

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Step 5.2.1

Multiply $2$ by $3$ .

$\frac{y (6 (x^{2} (e^{x^{2}})) + 3 e^{x^{2}} + 0) - (3 x e^{x^{2}} + 8) \frac{d}{d x} [y]}{y^{2}}$

Step 5.2.2

Add $6 x^{2} e^{x^{2}} + 3 e^{x^{2}}$ and $0$ .

$\frac{y (6 x^{2} e^{x^{2}} + 3 e^{x^{2}}) - (3 x e^{x^{2}} + 8) \frac{d}{d x} [y]}{y^{2}}$

Step 5.3

Reorder terms.

$\frac{y (6 e^{x^{2}} x^{2} + 3 e^{x^{2}}) - (3 x e^{x^{2}} + 8) \frac{d}{d x} [y]}{y^{2}}$

Step 5.4

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

$\frac{y (6 x^{2} e^{x^{2}} + 3 e^{x^{2}}) - (3 x e^{x^{2}} + 8) \frac{d}{d x} [y]}{y^{2}}$

Step 6

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

$\frac{y (6 x^{2} e^{x^{2}} + 3 e^{x^{2}}) - (3 x e^{x^{2}} + 8) \cdot 0}{y^{2}}$

Step 7

Simplify.

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Step 7.1

Apply the distributive property.

$\frac{y (6 x^{2} e^{x^{2}}) + y (3 e^{x^{2}}) - (3 x e^{x^{2}} + 8) \cdot 0}{y^{2}}$

Step 7.2

Apply the distributive property.

$\frac{y (6 x^{2} e^{x^{2}}) + y (3 e^{x^{2}}) + (- (3 x e^{x^{2}}) - 1 \cdot 8) \cdot 0}{y^{2}}$

Step 7.3

Apply the distributive property.

$\frac{y (6 x^{2} e^{x^{2}}) + y (3 e^{x^{2}}) - (3 x e^{x^{2}}) \cdot 0 - 1 \cdot 8 \cdot 0}{y^{2}}$

Step 7.4

Simplify the numerator.

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Step 7.4.1

Simplify each term.

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Step 7.4.1.1

Rewrite using the commutative property of multiplication.

$\frac{6 y x^{2} e^{x^{2}} + y (3 e^{x^{2}}) - (3 x e^{x^{2}}) \cdot 0 - 1 \cdot 8 \cdot 0}{y^{2}}$

Step 7.4.1.2

Rewrite using the commutative property of multiplication.

$\frac{6 y x^{2} e^{x^{2}} + 3 y e^{x^{2}} - (3 x e^{x^{2}}) \cdot 0 - 1 \cdot 8 \cdot 0}{y^{2}}$

Step 7.4.1.3

Multiply $3$ by $- 1$ .

$\frac{6 y x^{2} e^{x^{2}} + 3 y e^{x^{2}} - 3 (x e^{x^{2}}) \cdot 0 - 1 \cdot 8 \cdot 0}{y^{2}}$

Step 7.4.1.4

Multiply $- 3 x e^{x^{2}} \cdot 0$ .

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Step 7.4.1.4.1

Multiply $0$ by $- 3$ .

$\frac{6 y x^{2} e^{x^{2}} + 3 y e^{x^{2}} + 0 x e^{x^{2}} - 1 \cdot 8 \cdot 0}{y^{2}}$

Step 7.4.1.4.2

Multiply $0$ by $x$ .

$\frac{6 y x^{2} e^{x^{2}} + 3 y e^{x^{2}} + 0 e^{x^{2}} - 1 \cdot 8 \cdot 0}{y^{2}}$

Step 7.4.1.4.3

Multiply $0$ by $e^{x^{2}}$ .

$\frac{6 y x^{2} e^{x^{2}} + 3 y e^{x^{2}} + 0 - 1 \cdot 8 \cdot 0}{y^{2}}$

Step 7.4.1.5

Multiply $- 1 \cdot 8 \cdot 0$ .

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Step 7.4.1.5.1

Multiply $- 1$ by $8$ .

$\frac{6 y x^{2} e^{x^{2}} + 3 y e^{x^{2}} + 0 - 8 \cdot 0}{y^{2}}$

Step 7.4.1.5.2

Multiply $- 8$ by $0$ .

$\frac{6 y x^{2} e^{x^{2}} + 3 y e^{x^{2}} + 0 + 0}{y^{2}}$

Step 7.4.2

Combine the opposite terms in $6 y x^{2} e^{x^{2}} + 3 y e^{x^{2}} + 0 + 0$ .

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Step 7.4.2.1

Add $6 y x^{2} e^{x^{2}} + 3 y e^{x^{2}}$ and $0$ .

$\frac{6 y x^{2} e^{x^{2}} + 3 y e^{x^{2}} + 0}{y^{2}}$

Step 7.4.2.2

Add $6 y x^{2} e^{x^{2}} + 3 y e^{x^{2}}$ and $0$ .

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

Step 7.5

Reorder terms.

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

Step 7.6

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

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Step 7.6.1

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

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

Step 7.6.2

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

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

Step 7.6.3

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

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

Step 7.7

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

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Step 7.7.1

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

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

Step 7.7.2

Cancel the common factors.

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Step 7.7.2.1

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

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

Step 7.7.2.2

Cancel the common factor.

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

Step 7.7.2.3

Rewrite the expression.

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