Calculus Examples

$f (x) = 5 x^{3} - 3 x^{5}$

Step 1

Consider the limit definition of the derivative.

$f' (x) = lim_{h \to 0} \frac{f (x + h) - f (x)}{h}$

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.

$f (x + h) = 5 {(x + h)}^{3} - 3 {(x + h)}^{5}$

Step 2.1.2

Simplify the result.

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Step 2.1.2.1

Simplify each term.

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Step 2.1.2.1.1

Use the Binomial Theorem.

$f (x + h) = 5 (x^{3} + 3 x^{2} h + 3 x h^{2} + h^{3}) - 3 {(x + h)}^{5}$

Step 2.1.2.1.2

Apply the distributive property.

$f (x + h) = 5 x^{3} + 5 (3 x^{2} h) + 5 (3 x h^{2}) + 5 h^{3} - 3 {(x + h)}^{5}$

Step 2.1.2.1.3

Simplify.

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Step 2.1.2.1.3.1

Multiply $3$ by $5$ .

$f (x + h) = 5 x^{3} + 15 (x^{2} h) + 5 (3 x h^{2}) + 5 h^{3} - 3 {(x + h)}^{5}$

Step 2.1.2.1.3.2

Multiply $3$ by $5$ .

$f (x + h) = 5 x^{3} + 15 (x^{2} h) + 15 (x h^{2}) + 5 h^{3} - 3 {(x + h)}^{5}$

Step 2.1.2.1.4

Remove parentheses.

$f (x + h) = 5 x^{3} + 15 x^{2} h + 15 x h^{2} + 5 h^{3} - 3 {(x + h)}^{5}$

Step 2.1.2.1.5

Use the Binomial Theorem.

$f (x + h) = 5 x^{3} + 15 x^{2} h + 15 x h^{2} + 5 h^{3} - 3 (x^{5} + 5 x^{4} h + 10 x^{3} h^{2} + 10 x^{2} h^{3} + 5 x h^{4} + h^{5})$

Step 2.1.2.1.6

Apply the distributive property.

$f (x + h) = 5 x^{3} + 15 x^{2} h + 15 x h^{2} + 5 h^{3} - 3 x^{5} - 3 (5 x^{4} h) - 3 (10 x^{3} h^{2}) - 3 (10 x^{2} h^{3}) - 3 (5 x h^{4}) - 3 h^{5}$

Step 2.1.2.1.7

Simplify.

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Step 2.1.2.1.7.1

Multiply $5$ by $- 3$ .

$f (x + h) = 5 x^{3} + 15 x^{2} h + 15 x h^{2} + 5 h^{3} - 3 x^{5} - 15 (x^{4} h) - 3 (10 x^{3} h^{2}) - 3 (10 x^{2} h^{3}) - 3 (5 x h^{4}) - 3 h^{5}$

Step 2.1.2.1.7.2

Multiply $10$ by $- 3$ .

$f (x + h) = 5 x^{3} + 15 x^{2} h + 15 x h^{2} + 5 h^{3} - 3 x^{5} - 15 (x^{4} h) - 30 (x^{3} h^{2}) - 3 (10 x^{2} h^{3}) - 3 (5 x h^{4}) - 3 h^{5}$

Step 2.1.2.1.7.3

Multiply $10$ by $- 3$ .

$f (x + h) = 5 x^{3} + 15 x^{2} h + 15 x h^{2} + 5 h^{3} - 3 x^{5} - 15 (x^{4} h) - 30 (x^{3} h^{2}) - 30 (x^{2} h^{3}) - 3 (5 x h^{4}) - 3 h^{5}$

Step 2.1.2.1.7.4

Multiply $5$ by $- 3$ .

$f (x + h) = 5 x^{3} + 15 x^{2} h + 15 x h^{2} + 5 h^{3} - 3 x^{5} - 15 (x^{4} h) - 30 (x^{3} h^{2}) - 30 (x^{2} h^{3}) - 15 (x h^{4}) - 3 h^{5}$

Step 2.1.2.1.8

Remove parentheses.

$f (x + h) = 5 x^{3} + 15 x^{2} h + 15 x h^{2} + 5 h^{3} - 3 x^{5} - 15 x^{4} h - 30 x^{3} h^{2} - 30 x^{2} h^{3} - 15 x h^{4} - 3 h^{5}$

Step 2.1.2.2

The final answer is $5 x^{3} + 15 x^{2} h + 15 x h^{2} + 5 h^{3} - 3 x^{5} - 15 x^{4} h - 30 x^{3} h^{2} - 30 x^{2} h^{3} - 15 x h^{4} - 3 h^{5}$ .

$5 x^{3} + 15 x^{2} h + 15 x h^{2} + 5 h^{3} - 3 x^{5} - 15 x^{4} h - 30 x^{3} h^{2} - 30 x^{2} h^{3} - 15 x h^{4} - 3 h^{5}$

Step 2.2

Reorder.

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Step 2.2.1

Move $x^{2}$ .

$5 x^{3} + 15 h x^{2} + 15 x h^{2} + 5 h^{3} - 3 x^{5} - 15 x^{4} h - 30 x^{3} h^{2} - 30 x^{2} h^{3} - 15 x h^{4} - 3 h^{5}$

Step 2.2.2

Move $x$ .

$5 x^{3} + 15 h x^{2} + 15 h^{2} x + 5 h^{3} - 3 x^{5} - 15 x^{4} h - 30 x^{3} h^{2} - 30 x^{2} h^{3} - 15 x h^{4} - 3 h^{5}$

Step 2.2.3

Move $x^{4}$ .

$5 x^{3} + 15 h x^{2} + 15 h^{2} x + 5 h^{3} - 3 x^{5} - 15 h x^{4} - 30 x^{3} h^{2} - 30 x^{2} h^{3} - 15 x h^{4} - 3 h^{5}$

Step 2.2.4

Move $x^{3}$ .

$5 x^{3} + 15 h x^{2} + 15 h^{2} x + 5 h^{3} - 3 x^{5} - 15 h x^{4} - 30 h^{2} x^{3} - 30 x^{2} h^{3} - 15 x h^{4} - 3 h^{5}$

Step 2.2.5

Move $x^{2}$ .

$5 x^{3} + 15 h x^{2} + 15 h^{2} x + 5 h^{3} - 3 x^{5} - 15 h x^{4} - 30 h^{2} x^{3} - 30 h^{3} x^{2} - 15 x h^{4} - 3 h^{5}$

Step 2.2.6

Move $x$ .

$5 x^{3} + 15 h x^{2} + 15 h^{2} x + 5 h^{3} - 3 x^{5} - 15 h x^{4} - 30 h^{2} x^{3} - 30 h^{3} x^{2} - 15 h^{4} x - 3 h^{5}$

Step 2.2.7

Move $5 x^{3}$ .

$15 h x^{2} + 15 h^{2} x + 5 h^{3} - 3 x^{5} - 15 h x^{4} - 30 h^{2} x^{3} - 30 h^{3} x^{2} - 15 h^{4} x - 3 h^{5} + 5 x^{3}$

Step 2.2.8

Move $15 h x^{2}$ .

$15 h^{2} x + 5 h^{3} - 3 x^{5} - 15 h x^{4} - 30 h^{2} x^{3} - 30 h^{3} x^{2} - 15 h^{4} x - 3 h^{5} + 15 h x^{2} + 5 x^{3}$

Step 2.2.9

Move $15 h^{2} x$ .

$5 h^{3} - 3 x^{5} - 15 h x^{4} - 30 h^{2} x^{3} - 30 h^{3} x^{2} - 15 h^{4} x - 3 h^{5} + 15 h^{2} x + 15 h x^{2} + 5 x^{3}$

Step 2.2.10

Move $5 h^{3}$ .

$- 3 x^{5} - 15 h x^{4} - 30 h^{2} x^{3} - 30 h^{3} x^{2} - 15 h^{4} x - 3 h^{5} + 5 h^{3} + 15 h^{2} x + 15 h x^{2} + 5 x^{3}$

Step 2.2.11

Move $- 3 x^{5}$ .

$- 15 h x^{4} - 30 h^{2} x^{3} - 30 h^{3} x^{2} - 15 h^{4} x - 3 h^{5} - 3 x^{5} + 5 h^{3} + 15 h^{2} x + 15 h x^{2} + 5 x^{3}$

Step 2.2.12

Move $- 15 h x^{4}$ .

$- 30 h^{2} x^{3} - 30 h^{3} x^{2} - 15 h^{4} x - 3 h^{5} - 15 h x^{4} - 3 x^{5} + 5 h^{3} + 15 h^{2} x + 15 h x^{2} + 5 x^{3}$

Step 2.2.13

Move $- 30 h^{2} x^{3}$ .

$- 30 h^{3} x^{2} - 15 h^{4} x - 3 h^{5} - 30 h^{2} x^{3} - 15 h x^{4} - 3 x^{5} + 5 h^{3} + 15 h^{2} x + 15 h x^{2} + 5 x^{3}$

Step 2.2.14

Move $- 30 h^{3} x^{2}$ .

$- 15 h^{4} x - 3 h^{5} - 30 h^{3} x^{2} - 30 h^{2} x^{3} - 15 h x^{4} - 3 x^{5} + 5 h^{3} + 15 h^{2} x + 15 h x^{2} + 5 x^{3}$

Step 2.2.15

Reorder $- 15 h^{4} x$ and $- 3 h^{5}$ .

$- 3 h^{5} - 15 h^{4} x - 30 h^{3} x^{2} - 30 h^{2} x^{3} - 15 h x^{4} - 3 x^{5} + 5 h^{3} + 15 h^{2} x + 15 h x^{2} + 5 x^{3}$

Step 2.3

Find the components of the definition.

$f (x + h) = - 3 h^{5} - 15 h^{4} x - 30 h^{3} x^{2} - 30 h^{2} x^{3} - 15 h x^{4} - 3 x^{5} + 5 h^{3} + 15 h^{2} x + 15 h x^{2} + 5 x^{3}$

$f (x) = 5 x^{3} - 3 x^{5}$

$f (x + h) = - 3 h^{5} - 15 h^{4} x - 30 h^{3} x^{2} - 30 h^{2} x^{3} - 15 h x^{4} - 3 x^{5} + 5 h^{3} + 15 h^{2} x + 15 h x^{2} + 5 x^{3}$

$f (x) = 5 x^{3} - 3 x^{5}$

Step 3

Plug in the components.

$f' (x) = lim_{h \to 0} \frac{- 3 h^{5} - 15 h^{4} x - 30 h^{3} x^{2} - 30 h^{2} x^{3} - 15 h x^{4} - 3 x^{5} + 5 h^{3} + 15 h^{2} x + 15 h x^{2} + 5 x^{3} - (5 x^{3} - 3 x^{5})}{h}$

Step 4

Simplify.

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Step 4.1

Simplify the numerator.

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Step 4.1.1

Apply the distributive property.

$f' (x) = lim_{h \to 0} \frac{- 3 h^{5} - 15 h^{4} x - 30 h^{3} x^{2} - 30 h^{2} x^{3} - 15 h x^{4} - 3 x^{5} + 5 h^{3} + 15 h^{2} x + 15 h x^{2} + 5 x^{3} - (5 x^{3}) - (- 3 x^{5})}{h}$

Step 4.1.2

Multiply $5$ by $- 1$ .

$f' (x) = lim_{h \to 0} \frac{- 3 h^{5} - 15 h^{4} x - 30 h^{3} x^{2} - 30 h^{2} x^{3} - 15 h x^{4} - 3 x^{5} + 5 h^{3} + 15 h^{2} x + 15 h x^{2} + 5 x^{3} - 5 x^{3} - (- 3 x^{5})}{h}$

Step 4.1.3

Multiply $- 3$ by $- 1$ .

$f' (x) = lim_{h \to 0} \frac{- 3 h^{5} - 15 h^{4} x - 30 h^{3} x^{2} - 30 h^{2} x^{3} - 15 h x^{4} - 3 x^{5} + 5 h^{3} + 15 h^{2} x + 15 h x^{2} + 5 x^{3} - 5 x^{3} + 3 x^{5}}{h}$

Step 4.1.4

Add $- 3 x^{5}$ and $3 x^{5}$ .

$f' (x) = lim_{h \to 0} \frac{- 3 h^{5} - 15 h^{4} x - 30 h^{3} x^{2} - 30 h^{2} x^{3} - 15 h x^{4} + 5 h^{3} + 15 h^{2} x + 15 h x^{2} + 5 x^{3} - 5 x^{3} + 0}{h}$

Step 4.1.5

Add $- 3 h^{5} - 15 h^{4} x - 30 h^{3} x^{2} - 30 h^{2} x^{3} - 15 h x^{4} + 5 h^{3} + 15 h^{2} x + 15 h x^{2} + 5 x^{3} - 5 x^{3}$ and $0$ .

$f' (x) = lim_{h \to 0} \frac{- 3 h^{5} - 15 h^{4} x - 30 h^{3} x^{2} - 30 h^{2} x^{3} - 15 h x^{4} + 5 h^{3} + 15 h^{2} x + 15 h x^{2} + 5 x^{3} - 5 x^{3}}{h}$

Step 4.1.6

Subtract $5 x^{3}$ from $5 x^{3}$ .

$f' (x) = lim_{h \to 0} \frac{- 3 h^{5} - 15 h^{4} x - 30 h^{3} x^{2} - 30 h^{2} x^{3} - 15 h x^{4} + 5 h^{3} + 15 h^{2} x + 15 h x^{2} + 0}{h}$

Step 4.1.7

Add $- 3 h^{5} - 15 h^{4} x - 30 h^{3} x^{2} - 30 h^{2} x^{3} - 15 h x^{4} + 5 h^{3} + 15 h^{2} x + 15 h x^{2}$ and $0$ .

$f' (x) = lim_{h \to 0} \frac{- 3 h^{5} - 15 h^{4} x - 30 h^{3} x^{2} - 30 h^{2} x^{3} - 15 h x^{4} + 5 h^{3} + 15 h^{2} x + 15 h x^{2}}{h}$

Step 4.1.8

Factor $h$ out of $- 3 h^{5} - 15 h^{4} x - 30 h^{3} x^{2} - 30 h^{2} x^{3} - 15 h x^{4} + 5 h^{3} + 15 h^{2} x + 15 h x^{2}$ .

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Step 4.1.8.1

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

$f' (x) = lim_{h \to 0} \frac{h (- 3 h^{4}) - 15 h^{4} x - 30 h^{3} x^{2} - 30 h^{2} x^{3} - 15 h x^{4} + 5 h^{3} + 15 h^{2} x + 15 h x^{2}}{h}$

Step 4.1.8.2

Factor $h$ out of $- 15 h^{4} x$ .

$f' (x) = lim_{h \to 0} \frac{h (- 3 h^{4}) + h (- 15 h^{3} x) - 30 h^{3} x^{2} - 30 h^{2} x^{3} - 15 h x^{4} + 5 h^{3} + 15 h^{2} x + 15 h x^{2}}{h}$

Step 4.1.8.3

Factor $h$ out of $- 30 h^{3} x^{2}$ .

$f' (x) = lim_{h \to 0} \frac{h (- 3 h^{4}) + h (- 15 h^{3} x) + h (- 30 h^{2} x^{2}) - 30 h^{2} x^{3} - 15 h x^{4} + 5 h^{3} + 15 h^{2} x + 15 h x^{2}}{h}$

Step 4.1.8.4

Factor $h$ out of $- 30 h^{2} x^{3}$ .

$f' (x) = lim_{h \to 0} \frac{h (- 3 h^{4}) + h (- 15 h^{3} x) + h (- 30 h^{2} x^{2}) + h (- 30 h x^{3}) - 15 h x^{4} + 5 h^{3} + 15 h^{2} x + 15 h x^{2}}{h}$

Step 4.1.8.5

Factor $h$ out of $- 15 h x^{4}$ .

$f' (x) = lim_{h \to 0} \frac{h (- 3 h^{4}) + h (- 15 h^{3} x) + h (- 30 h^{2} x^{2}) + h (- 30 h x^{3}) + h (- 15 x^{4}) + 5 h^{3} + 15 h^{2} x + 15 h x^{2}}{h}$

Step 4.1.8.6

Factor $h$ out of $5 h^{3}$ .

$f' (x) = lim_{h \to 0} \frac{h (- 3 h^{4}) + h (- 15 h^{3} x) + h (- 30 h^{2} x^{2}) + h (- 30 h x^{3}) + h (- 15 x^{4}) + h (5 h^{2}) + 15 h^{2} x + 15 h x^{2}}{h}$

Step 4.1.8.7

Factor $h$ out of $15 h^{2} x$ .

$f' (x) = lim_{h \to 0} \frac{h (- 3 h^{4}) + h (- 15 h^{3} x) + h (- 30 h^{2} x^{2}) + h (- 30 h x^{3}) + h (- 15 x^{4}) + h (5 h^{2}) + h (15 h x) + 15 h x^{2}}{h}$

Step 4.1.8.8

Factor $h$ out of $15 h x^{2}$ .

$f' (x) = lim_{h \to 0} \frac{h (- 3 h^{4}) + h (- 15 h^{3} x) + h (- 30 h^{2} x^{2}) + h (- 30 h x^{3}) + h (- 15 x^{4}) + h (5 h^{2}) + h (15 h x) + h (15 x^{2})}{h}$

Step 4.1.8.9

Factor $h$ out of $h (- 3 h^{4}) + h (- 15 h^{3} x)$ .

$f' (x) = lim_{h \to 0} \frac{h (- 3 h^{4} - 15 h^{3} x) + h (- 30 h^{2} x^{2}) + h (- 30 h x^{3}) + h (- 15 x^{4}) + h (5 h^{2}) + h (15 h x) + h (15 x^{2})}{h}$

Step 4.1.8.10

Factor $h$ out of $h (- 3 h^{4} - 15 h^{3} x) + h (- 30 h^{2} x^{2})$ .

$f' (x) = lim_{h \to 0} \frac{h (- 3 h^{4} - 15 h^{3} x - 30 h^{2} x^{2}) + h (- 30 h x^{3}) + h (- 15 x^{4}) + h (5 h^{2}) + h (15 h x) + h (15 x^{2})}{h}$

Step 4.1.8.11

Factor $h$ out of $h (- 3 h^{4} - 15 h^{3} x - 30 h^{2} x^{2}) + h (- 30 h x^{3})$ .

$f' (x) = lim_{h \to 0} \frac{h (- 3 h^{4} - 15 h^{3} x - 30 h^{2} x^{2} - 30 h x^{3}) + h (- 15 x^{4}) + h (5 h^{2}) + h (15 h x) + h (15 x^{2})}{h}$

Step 4.1.8.12

Factor $h$ out of $h (- 3 h^{4} - 15 h^{3} x - 30 h^{2} x^{2} - 30 h x^{3}) + h (- 15 x^{4})$ .

$f' (x) = lim_{h \to 0} \frac{h (- 3 h^{4} - 15 h^{3} x - 30 h^{2} x^{2} - 30 h x^{3} - 15 x^{4}) + h (5 h^{2}) + h (15 h x) + h (15 x^{2})}{h}$

Step 4.1.8.13

Factor $h$ out of $h (- 3 h^{4} - 15 h^{3} x - 30 h^{2} x^{2} - 30 h x^{3} - 15 x^{4}) + h (5 h^{2})$ .

$f' (x) = lim_{h \to 0} \frac{h (- 3 h^{4} - 15 h^{3} x - 30 h^{2} x^{2} - 30 h x^{3} - 15 x^{4} + 5 h^{2}) + h (15 h x) + h (15 x^{2})}{h}$

Step 4.1.8.14

Factor $h$ out of $h (- 3 h^{4} - 15 h^{3} x - 30 h^{2} x^{2} - 30 h x^{3} - 15 x^{4} + 5 h^{2}) + h (15 h x)$ .

$f' (x) = lim_{h \to 0} \frac{h (- 3 h^{4} - 15 h^{3} x - 30 h^{2} x^{2} - 30 h x^{3} - 15 x^{4} + 5 h^{2} + 15 h x) + h (15 x^{2})}{h}$

Step 4.1.8.15

Factor $h$ out of $h (- 3 h^{4} - 15 h^{3} x - 30 h^{2} x^{2} - 30 h x^{3} - 15 x^{4} + 5 h^{2} + 15 h x) + h (15 x^{2})$ .

$f' (x) = lim_{h \to 0} \frac{h (- 3 h^{4} - 15 h^{3} x - 30 h^{2} x^{2} - 30 h x^{3} - 15 x^{4} + 5 h^{2} + 15 h x + 15 x^{2})}{h}$

Step 4.2

Reduce the expression by cancelling the common factors.

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Step 4.2.1

Cancel the common factor of $h$ .

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Step 4.2.1.1

Cancel the common factor.

$f' (x) = lim_{h \to 0} \frac{h (- 3 h^{4} - 15 h^{3} x - 30 h^{2} x^{2} - 30 h x^{3} - 15 x^{4} + 5 h^{2} + 15 h x + 15 x^{2})}{h}$

Step 4.2.1.2

Divide $- 3 h^{4} - 15 h^{3} x - 30 h^{2} x^{2} - 30 h x^{3} - 15 x^{4} + 5 h^{2} + 15 h x + 15 x^{2}$ by $1$ .

$f' (x) = lim_{h \to 0} - 3 h^{4} - 15 h^{3} x - 30 h^{2} x^{2} - 30 h x^{3} - 15 x^{4} + 5 h^{2} + 15 h x + 15 x^{2}$

Step 4.2.2

Simplify the expression.

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Step 4.2.2.1

Move $h^{3}$ .

$f' (x) = lim_{h \to 0} - 3 h^{4} - 15 x h^{3} - 30 h^{2} x^{2} - 30 h x^{3} - 15 x^{4} + 5 h^{2} + 15 h x + 15 x^{2}$

Step 4.2.2.2

Move $h^{2}$ .

$f' (x) = lim_{h \to 0} - 3 h^{4} - 15 x h^{3} - 30 x^{2} h^{2} - 30 h x^{3} - 15 x^{4} + 5 h^{2} + 15 h x + 15 x^{2}$

Step 4.2.2.3

Move $h$ .

$f' (x) = lim_{h \to 0} - 3 h^{4} - 15 x h^{3} - 30 x^{2} h^{2} - 30 x^{3} h - 15 x^{4} + 5 h^{2} + 15 h x + 15 x^{2}$

Step 4.2.2.4

Move $h$ .

$f' (x) = lim_{h \to 0} - 3 h^{4} - 15 x h^{3} - 30 x^{2} h^{2} - 30 x^{3} h - 15 x^{4} + 5 h^{2} + 15 x h + 15 x^{2}$

Step 4.2.2.5

Move $5 h^{2}$ .

$f' (x) = lim_{h \to 0} - 3 h^{4} - 15 x h^{3} - 30 x^{2} h^{2} - 30 x^{3} h - 15 x^{4} + 15 x h + 15 x^{2} + 5 h^{2}$

Step 4.2.2.6

Move $15 x h$ .

$f' (x) = lim_{h \to 0} - 3 h^{4} - 15 x h^{3} - 30 x^{2} h^{2} - 30 x^{3} h - 15 x^{4} + 15 x^{2} + 15 x h + 5 h^{2}$

Step 4.2.2.7

Move $- 3 h^{4}$ .

$f' (x) = lim_{h \to 0} - 15 x h^{3} - 30 x^{2} h^{2} - 30 x^{3} h - 15 x^{4} - 3 h^{4} + 15 x^{2} + 15 x h + 5 h^{2}$

Step 4.2.2.8

Move $- 15 x h^{3}$ .

$f' (x) = lim_{h \to 0} - 30 x^{2} h^{2} - 30 x^{3} h - 15 x^{4} - 15 x h^{3} - 3 h^{4} + 15 x^{2} + 15 x h + 5 h^{2}$

Step 4.2.2.9

Move $- 30 x^{2} h^{2}$ .

$f' (x) = lim_{h \to 0} - 30 x^{3} h - 15 x^{4} - 30 x^{2} h^{2} - 15 x h^{3} - 3 h^{4} + 15 x^{2} + 15 x h + 5 h^{2}$

Step 4.2.2.10

Reorder $- 30 x^{3} h$ and $- 15 x^{4}$ .

$f' (x) = lim_{h \to 0} - 15 x^{4} - 30 x^{3} h - 30 x^{2} h^{2} - 15 x h^{3} - 3 h^{4} + 15 x^{2} + 15 x h + 5 h^{2}$

Step 5

Split the limit using the Sum of Limits Rule on the limit as $h$ approaches $0$ .

$- lim_{h \to 0} 15 x^{4} - lim_{h \to 0} 30 x^{3} h - lim_{h \to 0} 30 x^{2} h^{2} - lim_{h \to 0} 15 x h^{3} - lim_{h \to 0} 3 h^{4} + lim_{h \to 0} 15 x^{2} + lim_{h \to 0} 15 x h + lim_{h \to 0} 5 h^{2}$

Step 6

Evaluate the limit of $15 x^{4}$ which is constant as $h$ approaches $0$ .

$- 15 x^{4} - lim_{h \to 0} 30 x^{3} h - lim_{h \to 0} 30 x^{2} h^{2} - lim_{h \to 0} 15 x h^{3} - lim_{h \to 0} 3 h^{4} + lim_{h \to 0} 15 x^{2} + lim_{h \to 0} 15 x h + lim_{h \to 0} 5 h^{2}$

Step 7

Move the term $30 x^{3}$ outside of the limit because it is constant with respect to $h$ .

$- 15 x^{4} - 1 \cdot 30 x^{3} lim_{h \to 0} h - lim_{h \to 0} 30 x^{2} h^{2} - lim_{h \to 0} 15 x h^{3} - lim_{h \to 0} 3 h^{4} + lim_{h \to 0} 15 x^{2} + lim_{h \to 0} 15 x h + lim_{h \to 0} 5 h^{2}$

Step 8

Move the term $30 x^{2}$ outside of the limit because it is constant with respect to $h$ .

$- 15 x^{4} - 1 \cdot 30 x^{3} lim_{h \to 0} h - 1 \cdot 30 x^{2} lim_{h \to 0} h^{2} - lim_{h \to 0} 15 x h^{3} - lim_{h \to 0} 3 h^{4} + lim_{h \to 0} 15 x^{2} + lim_{h \to 0} 15 x h + lim_{h \to 0} 5 h^{2}$

Step 9

Move the exponent $2$ from $h^{2}$ outside the limit using the Limits Power Rule.

$- 15 x^{4} - 1 \cdot 30 x^{3} lim_{h \to 0} h - 1 \cdot 30 x^{2} {(lim_{h \to 0} h)}^{2} - lim_{h \to 0} 15 x h^{3} - lim_{h \to 0} 3 h^{4} + lim_{h \to 0} 15 x^{2} + lim_{h \to 0} 15 x h + lim_{h \to 0} 5 h^{2}$

Step 10

Move the term $15 x$ outside of the limit because it is constant with respect to $h$ .

$- 15 x^{4} - 1 \cdot 30 x^{3} lim_{h \to 0} h - 1 \cdot 30 x^{2} {(lim_{h \to 0} h)}^{2} - 1 \cdot 15 x lim_{h \to 0} h^{3} - lim_{h \to 0} 3 h^{4} + lim_{h \to 0} 15 x^{2} + lim_{h \to 0} 15 x h + lim_{h \to 0} 5 h^{2}$

Step 11

Move the exponent $3$ from $h^{3}$ outside the limit using the Limits Power Rule.

$- 15 x^{4} - 1 \cdot 30 x^{3} lim_{h \to 0} h - 1 \cdot 30 x^{2} {(lim_{h \to 0} h)}^{2} - 1 \cdot 15 x {(lim_{h \to 0} h)}^{3} - lim_{h \to 0} 3 h^{4} + lim_{h \to 0} 15 x^{2} + lim_{h \to 0} 15 x h + lim_{h \to 0} 5 h^{2}$

Step 12

Move the term $3$ outside of the limit because it is constant with respect to $h$ .

$- 15 x^{4} - 1 \cdot 30 x^{3} lim_{h \to 0} h - 1 \cdot 30 x^{2} {(lim_{h \to 0} h)}^{2} - 1 \cdot 15 x {(lim_{h \to 0} h)}^{3} - 3 lim_{h \to 0} h^{4} + lim_{h \to 0} 15 x^{2} + lim_{h \to 0} 15 x h + lim_{h \to 0} 5 h^{2}$

Step 13

Move the exponent $4$ from $h^{4}$ outside the limit using the Limits Power Rule.

$- 15 x^{4} - 1 \cdot 30 x^{3} lim_{h \to 0} h - 1 \cdot 30 x^{2} {(lim_{h \to 0} h)}^{2} - 1 \cdot 15 x {(lim_{h \to 0} h)}^{3} - 3 {(lim_{h \to 0} h)}^{4} + lim_{h \to 0} 15 x^{2} + lim_{h \to 0} 15 x h + lim_{h \to 0} 5 h^{2}$

Step 14

Evaluate the limit of $15 x^{2}$ which is constant as $h$ approaches $0$ .

$- 15 x^{4} - 1 \cdot 30 x^{3} lim_{h \to 0} h - 1 \cdot 30 x^{2} {(lim_{h \to 0} h)}^{2} - 1 \cdot 15 x {(lim_{h \to 0} h)}^{3} - 3 {(lim_{h \to 0} h)}^{4} + 15 x^{2} + lim_{h \to 0} 15 x h + lim_{h \to 0} 5 h^{2}$

Step 15

Move the term $15 x$ outside of the limit because it is constant with respect to $h$ .

$- 15 x^{4} - 1 \cdot 30 x^{3} lim_{h \to 0} h - 1 \cdot 30 x^{2} {(lim_{h \to 0} h)}^{2} - 1 \cdot 15 x {(lim_{h \to 0} h)}^{3} - 3 {(lim_{h \to 0} h)}^{4} + 15 x^{2} + 15 x lim_{h \to 0} h + lim_{h \to 0} 5 h^{2}$

Step 16

Move the term $5$ outside of the limit because it is constant with respect to $h$ .

$- 15 x^{4} - 1 \cdot 30 x^{3} lim_{h \to 0} h - 1 \cdot 30 x^{2} {(lim_{h \to 0} h)}^{2} - 1 \cdot 15 x {(lim_{h \to 0} h)}^{3} - 3 {(lim_{h \to 0} h)}^{4} + 15 x^{2} + 15 x lim_{h \to 0} h + 5 lim_{h \to 0} h^{2}$

Step 17

Move the exponent $2$ from $h^{2}$ outside the limit using the Limits Power Rule.

$- 15 x^{4} - 1 \cdot 30 x^{3} lim_{h \to 0} h - 1 \cdot 30 x^{2} {(lim_{h \to 0} h)}^{2} - 1 \cdot 15 x {(lim_{h \to 0} h)}^{3} - 3 {(lim_{h \to 0} h)}^{4} + 15 x^{2} + 15 x lim_{h \to 0} h + 5 {(lim_{h \to 0} h)}^{2}$

Step 18

Evaluate the limits by plugging in $0$ for all occurrences of $h$ .

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Step 18.1