Calculus Examples

$H (x) = \frac{5}{6 x^{5}}$

Step 1

Consider the difference quotient formula.

$\frac{f (x + h) - f (x)}{h}$

Step 2

Find the components of the definition.

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Step 2.1

Evaluate the function at $x = x + h$ .

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Step 2.1.1

Replace the variable $x$ with $x + h$ in the expression.

$H (x + h) = \frac{5}{6 {(x + h)}^{5}}$

Step 2.1.2

The final answer is $\frac{5}{6 {(x + h)}^{5}}$ .

$\frac{5}{6 {(x + h)}^{5}}$

Step 2.2

Find the components of the definition.

$H (x + h) = \frac{5}{6 {(x + h)}^{5}}$

$H (x) = \frac{5}{6 x^{5}}$

$H (x + h) = \frac{5}{6 {(x + h)}^{5}}$

$H (x) = \frac{5}{6 x^{5}}$

Step 3

Plug in the components.

$\frac{H (x + h) - H x}{h} = \frac{\frac{5}{6 {(x + h)}^{5}} - (\frac{5}{6 x^{5}})}{h}$

Step 4

Simplify.

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Step 4.1

Simplify the numerator.

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Step 4.1.1

To write $\frac{5}{6 {(x + h)}^{5}}$ as a fraction with a common denominator, multiply by $\frac{x^{5}}{x^{5}}$ .

$\frac{\frac{5}{6 {(x + h)}^{5}} \cdot \frac{x^{5}}{x^{5}} - \frac{5}{6 x^{5}}}{h}$

Step 4.1.2

To write $- \frac{5}{6 x^{5}}$ as a fraction with a common denominator, multiply by $\frac{{(x + h)}^{5}}{{(x + h)}^{5}}$ .

$\frac{\frac{5}{6 {(x + h)}^{5}} \cdot \frac{x^{5}}{x^{5}} - \frac{5}{6 x^{5}} \cdot \frac{{(x + h)}^{5}}{{(x + h)}^{5}}}{h}$

Step 4.1.3

Write each expression with a common denominator of $6 {(x + h)}^{5} x^{5}$ , by multiplying each by an appropriate factor of $1$ .

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Step 4.1.3.1

Multiply $\frac{5}{6 {(x + h)}^{5}}$ by $\frac{x^{5}}{x^{5}}$ .

$\frac{\frac{5 x^{5}}{6 {(x + h)}^{5} x^{5}} - \frac{5}{6 x^{5}} \cdot \frac{{(x + h)}^{5}}{{(x + h)}^{5}}}{h}$

Step 4.1.3.2

Multiply $\frac{5}{6 x^{5}}$ by $\frac{{(x + h)}^{5}}{{(x + h)}^{5}}$ .

$\frac{\frac{5 x^{5}}{6 {(x + h)}^{5} x^{5}} - \frac{5 {(x + h)}^{5}}{6 x^{5} {(x + h)}^{5}}}{h}$

Step 4.1.3.3

Reorder the factors of $6 {(x + h)}^{5} x^{5}$ .

$\frac{\frac{5 x^{5}}{6 x^{5} {(x + h)}^{5}} - \frac{5 {(x + h)}^{5}}{6 x^{5} {(x + h)}^{5}}}{h}$

Step 4.1.4

Combine the numerators over the common denominator.

$\frac{\frac{5 x^{5} - 5 {(x + h)}^{5}}{6 x^{5} {(x + h)}^{5}}}{h}$

Step 4.1.5

Simplify the numerator.

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Step 4.1.5.1

Factor $5$ out of $5 x^{5} - 5 {(x + h)}^{5}$ .

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Step 4.1.5.1.1

Factor $5$ out of $5 x^{5}$ .

$\frac{\frac{5 (x^{5}) - 5 {(x + h)}^{5}}{6 x^{5} {(x + h)}^{5}}}{h}$

Step 4.1.5.1.2

Factor $5$ out of $- 5 {(x + h)}^{5}$ .

$\frac{\frac{5 (x^{5}) + 5 (- {(x + h)}^{5})}{6 x^{5} {(x + h)}^{5}}}{h}$

Step 4.1.5.1.3

Factor $5$ out of $5 (x^{5}) + 5 (- {(x + h)}^{5})$ .

$\frac{\frac{5 (x^{5} - {(x + h)}^{5})}{6 x^{5} {(x + h)}^{5}}}{h}$

Step 4.1.5.2

Use the Binomial Theorem.

$\frac{\frac{5 (x^{5} - (x^{5} + 5 x^{4} h + 10 x^{3} h^{2} + 10 x^{2} h^{3} + 5 x h^{4} + h^{5}))}{6 x^{5} {(x + h)}^{5}}}{h}$

Step 4.1.5.3

Apply the distributive property.

$\frac{\frac{5 (x^{5} - x^{5} - (5 x^{4} h) - (10 x^{3} h^{2}) - (10 x^{2} h^{3}) - (5 x h^{4}) - h^{5})}{6 x^{5} {(x + h)}^{5}}}{h}$

Step 4.1.5.4

Simplify.

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Step 4.1.5.4.1

Multiply $5$ by $- 1$ .

$\frac{\frac{5 (x^{5} - x^{5} - 5 (x^{4} h) - (10 x^{3} h^{2}) - (10 x^{2} h^{3}) - (5 x h^{4}) - h^{5})}{6 x^{5} {(x + h)}^{5}}}{h}$

Step 4.1.5.4.2

Multiply $10$ by $- 1$ .

$\frac{\frac{5 (x^{5} - x^{5} - 5 (x^{4} h) - 10 (x^{3} h^{2}) - (10 x^{2} h^{3}) - (5 x h^{4}) - h^{5})}{6 x^{5} {(x + h)}^{5}}}{h}$

Step 4.1.5.4.3

Multiply $10$ by $- 1$ .

$\frac{\frac{5 (x^{5} - x^{5} - 5 (x^{4} h) - 10 (x^{3} h^{2}) - 10 (x^{2} h^{3}) - (5 x h^{4}) - h^{5})}{6 x^{5} {(x + h)}^{5}}}{h}$

Step 4.1.5.4.4

Multiply $5$ by $- 1$ .

$\frac{\frac{5 (x^{5} - x^{5} - 5 (x^{4} h) - 10 (x^{3} h^{2}) - 10 (x^{2} h^{3}) - 5 (x h^{4}) - h^{5})}{6 x^{5} {(x + h)}^{5}}}{h}$

Step 4.1.5.5

Remove parentheses.

$\frac{\frac{5 (x^{5} - x^{5} - 5 x^{4} h - 10 x^{3} h^{2} - 10 x^{2} h^{3} - 5 x h^{4} - h^{5})}{6 x^{5} {(x + h)}^{5}}}{h}$

Step 4.1.5.6

Subtract $x^{5}$ from $x^{5}$ .

$\frac{\frac{5 (0 - 5 x^{4} h - 10 x^{3} h^{2} - 10 x^{2} h^{3} - 5 x h^{4} - h^{5})}{6 x^{5} {(x + h)}^{5}}}{h}$

Step 4.1.5.7

Subtract $5 x^{4} h$ from $0$ .

$\frac{\frac{5 (- 5 x^{4} h - 10 x^{3} h^{2} - 10 x^{2} h^{3} - 5 x h^{4} - h^{5})}{6 x^{5} {(x + h)}^{5}}}{h}$

Step 4.1.5.8

Factor $h$ out of $- 5 x^{4} h - 10 x^{3} h^{2} - 10 x^{2} h^{3} - 5 x h^{4} - h^{5}$ .

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Step 4.1.5.8.1

Factor $h$ out of $- 5 x^{4} h$ .

$\frac{\frac{5 (h (- 5 x^{4}) - 10 x^{3} h^{2} - 10 x^{2} h^{3} - 5 x h^{4} - h^{5})}{6 x^{5} {(x + h)}^{5}}}{h}$

Step 4.1.5.8.2

Factor $h$ out of $- 10 x^{3} h^{2}$ .

$\frac{\frac{5 (h (- 5 x^{4}) + h (- 10 x^{3} h) - 10 x^{2} h^{3} - 5 x h^{4} - h^{5})}{6 x^{5} {(x + h)}^{5}}}{h}$

Step 4.1.5.8.3

Factor $h$ out of $- 10 x^{2} h^{3}$ .

$\frac{\frac{5 (h (- 5 x^{4}) + h (- 10 x^{3} h) + h (- 10 x^{2} h^{2}) - 5 x h^{4} - h^{5})}{6 x^{5} {(x + h)}^{5}}}{h}$

Step 4.1.5.8.4

Factor $h$ out of $- 5 x h^{4}$ .

$\frac{\frac{5 (h (- 5 x^{4}) + h (- 10 x^{3} h) + h (- 10 x^{2} h^{2}) + h (- 5 x h^{3}) - h^{5})}{6 x^{5} {(x + h)}^{5}}}{h}$

Step 4.1.5.8.5

Factor $h$ out of $- h^{5}$ .

$\frac{\frac{5 (h (- 5 x^{4}) + h (- 10 x^{3} h) + h (- 10 x^{2} h^{2}) + h (- 5 x h^{3}) + h (- h^{4}))}{6 x^{5} {(x + h)}^{5}}}{h}$

Step 4.1.5.8.6

Factor $h$ out of $h (- 5 x^{4}) + h (- 10 x^{3} h)$ .

$\frac{\frac{5 (h (- 5 x^{4} - 10 x^{3} h) + h (- 10 x^{2} h^{2}) + h (- 5 x h^{3}) + h (- h^{4}))}{6 x^{5} {(x + h)}^{5}}}{h}$

Step 4.1.5.8.7

Factor $h$ out of $h (- 5 x^{4} - 10 x^{3} h) + h (- 10 x^{2} h^{2})$ .

$\frac{\frac{5 (h (- 5 x^{4} - 10 x^{3} h - 10 x^{2} h^{2}) + h (- 5 x h^{3}) + h (- h^{4}))}{6 x^{5} {(x + h)}^{5}}}{h}$

Step 4.1.5.8.8

Factor $h$ out of $h (- 5 x^{4} - 10 x^{3} h - 10 x^{2} h^{2}) + h (- 5 x h^{3})$ .

$\frac{\frac{5 (h (- 5 x^{4} - 10 x^{3} h - 10 x^{2} h^{2} - 5 x h^{3}) + h (- h^{4}))}{6 x^{5} {(x + h)}^{5}}}{h}$

Step 4.1.5.8.9

Factor $h$ out of $h (- 5 x^{4} - 10 x^{3} h - 10 x^{2} h^{2} - 5 x h^{3}) + h (- h^{4})$ .

$\frac{\frac{5 (h (- 5 x^{4} - 10 x^{3} h - 10 x^{2} h^{2} - 5 x h^{3} - h^{4}))}{6 x^{5} {(x + h)}^{5}}}{h}$

$\frac{\frac{5 h (- 5 x^{4} - 10 x^{3} h - 10 x^{2} h^{2} - 5 x h^{3} - h^{4})}{6 x^{5} {(x + h)}^{5}}}{h}$

Step 4.2

Multiply the numerator by the reciprocal of the denominator.

$\frac{5 h (- 5 x^{4} - 10 x^{3} h - 10 x^{2} h^{2} - 5 x h^{3} - h^{4})}{6 x^{5} {(x + h)}^{5}} \cdot \frac{1}{h}$

Step 4.3

Combine.

$\frac{5 h (- 5 x^{4} - 10 x^{3} h - 10 x^{2} h^{2} - 5 x h^{3} - h^{4}) \cdot 1}{6 x^{5} {(x + h)}^{5} h}$

Step 4.4

Cancel the common factor of $h$ .

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Step 4.4.1

Cancel the common factor.

$\frac{5 h (- 5 x^{4} - 10 x^{3} h - 10 x^{2} h^{2} - 5 x h^{3} - h^{4}) \cdot 1}{6 x^{5} {(x + h)}^{5} h}$

Step 4.4.2

Rewrite the expression.

$\frac{5 (- 5 x^{4} - 10 x^{3} h - 10 x^{2} h^{2} - 5 x h^{3} - h^{4}) \cdot 1}{6 x^{5} {(x + h)}^{5}}$

Step 4.5

Multiply $5$ by $1$ .

$\frac{5 (- 5 x^{4} - 10 x^{3} h - 10 x^{2} h^{2} - 5 x h^{3} - h^{4})}{6 x^{5} {(x + h)}^{5}}$

Step 4.6

Factor $- 1$ out of $- 5 x^{4}$ .

$\frac{5 (- (5 x^{4}) - 10 x^{3} h - 10 x^{2} h^{2} - 5 x h^{3} - h^{4})}{6 x^{5} {(x + h)}^{5}}$

Step 4.7

Factor $- 1$ out of $- 10 x^{3} h$ .

$\frac{5 (- (5 x^{4}) - (10 x^{3} h) - 10 x^{2} h^{2} - 5 x h^{3} - h^{4})}{6 x^{5} {(x + h)}^{5}}$

Step 4.8

Factor $- 1$ out of $- (5 x^{4}) - (10 x^{3} h)$ .

$\frac{5 (- (5 x^{4} + 10 x^{3} h) - 10 x^{2} h^{2} - 5 x h^{3} - h^{4})}{6 x^{5} {(x + h)}^{5}}$

Step 4.9

Factor $- 1$ out of $- 10 x^{2} h^{2}$ .

$\frac{5 (- (5 x^{4} + 10 x^{3} h) - (10 x^{2} h^{2}) - 5 x h^{3} - h^{4})}{6 x^{5} {(x + h)}^{5}}$

Step 4.10

Factor $- 1$ out of $- (5 x^{4} + 10 x^{3} h) - (10 x^{2} h^{2})$ .

$\frac{5 (- (5 x^{4} + 10 x^{3} h + 10 x^{2} h^{2}) - 5 x h^{3} - h^{4})}{6 x^{5} {(x + h)}^{5}}$

Step 4.11

Factor $- 1$ out of $- 5 x h^{3}$ .

$\frac{5 (- (5 x^{4} + 10 x^{3} h + 10 x^{2} h^{2}) - (5 x h^{3}) - h^{4})}{6 x^{5} {(x + h)}^{5}}$

Step 4.12

Factor $- 1$ out of $- (5 x^{4} + 10 x^{3} h + 10 x^{2} h^{2}) - (5 x h^{3})$ .

$\frac{5 (- (5 x^{4} + 10 x^{3} h + 10 x^{2} h^{2} + 5 x h^{3}) - h^{4})}{6 x^{5} {(x + h)}^{5}}$

Step 4.13

Factor $- 1$ out of $- (5 x^{4} + 10 x^{3} h + 10 x^{2} h^{2} + 5 x h^{3}) - h^{4}$ .

$\frac{5 (- (5 x^{4} + 10 x^{3} h + 10 x^{2} h^{2} + 5 x h^{3} + h^{4}))}{6 x^{5} {(x + h)}^{5}}$

Step 4.14

Simplify the expression.

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Step 4.14.1

Rewrite $- (5 x^{4} + 10 x^{3} h + 10 x^{2} h^{2} + 5 x h^{3} + h^{4})$ as $- 1 (5 x^{4} + 10 x^{3} h + 10 x^{2} h^{2} + 5 x h^{3} + h^{4})$ .

$\frac{5 (- 1 (5 x^{4} + 10 x^{3} h + 10 x^{2} h^{2} + 5 x h^{3} + h^{4}))}{6 x^{5} {(x + h)}^{5}}$

Step 4.14.2

Move the negative in front of the fraction.

$- \frac{5 (5 x^{4} + 10 x^{3} h + 10 x^{2} h^{2} + 5 x h^{3} + h^{4})}{6 x^{5} {(x + h)}^{5}}$

Step 5