Calculus Examples

$r (t) = - 6 t {(5 x^{4} - 1)}^{4}$

Step 1

Use the Binomial Theorem.

$\frac{d}{d t} [- 6 t ({(5 x^{4})}^{4} + 4 {(5 x^{4})}^{3} \cdot - 1 + 6 {(5 x^{4})}^{2} {(- 1)}^{2} + 4 (5 x^{4}) {(- 1)}^{3} + {(- 1)}^{4})]$

Step 2

Simplify each term.

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Step 2.1

Apply the product rule to $5 x^{4}$ .

$\frac{d}{d t} [- 6 t (5^{4} {(x^{4})}^{4} + 4 {(5 x^{4})}^{3} \cdot - 1 + 6 {(5 x^{4})}^{2} {(- 1)}^{2} + 4 (5 x^{4}) {(- 1)}^{3} + {(- 1)}^{4})]$

Step 2.2

Raise $5$ to the power of $4$ .

$\frac{d}{d t} [- 6 t (625 {(x^{4})}^{4} + 4 {(5 x^{4})}^{3} \cdot - 1 + 6 {(5 x^{4})}^{2} {(- 1)}^{2} + 4 (5 x^{4}) {(- 1)}^{3} + {(- 1)}^{4})]$

Step 2.3

Multiply the exponents in ${(x^{4})}^{4}$ .

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Step 2.3.1

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

$\frac{d}{d t} [- 6 t (625 x^{4 \cdot 4} + 4 {(5 x^{4})}^{3} \cdot - 1 + 6 {(5 x^{4})}^{2} {(- 1)}^{2} + 4 (5 x^{4}) {(- 1)}^{3} + {(- 1)}^{4})]$

Step 2.3.2

Multiply $4$ by $4$ .

$\frac{d}{d t} [- 6 t (625 x^{16} + 4 {(5 x^{4})}^{3} \cdot - 1 + 6 {(5 x^{4})}^{2} {(- 1)}^{2} + 4 (5 x^{4}) {(- 1)}^{3} + {(- 1)}^{4})]$

Step 2.4

Apply the product rule to $5 x^{4}$ .

$\frac{d}{d t} [- 6 t (625 x^{16} + 4 (5^{3} {(x^{4})}^{3}) \cdot - 1 + 6 {(5 x^{4})}^{2} {(- 1)}^{2} + 4 (5 x^{4}) {(- 1)}^{3} + {(- 1)}^{4})]$

Step 2.5

Raise $5$ to the power of $3$ .

$\frac{d}{d t} [- 6 t (625 x^{16} + 4 (125 {(x^{4})}^{3}) \cdot - 1 + 6 {(5 x^{4})}^{2} {(- 1)}^{2} + 4 (5 x^{4}) {(- 1)}^{3} + {(- 1)}^{4})]$

Step 2.6

Multiply the exponents in ${(x^{4})}^{3}$ .

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Step 2.6.1

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

$\frac{d}{d t} [- 6 t (625 x^{16} + 4 (125 x^{4 \cdot 3}) \cdot - 1 + 6 {(5 x^{4})}^{2} {(- 1)}^{2} + 4 (5 x^{4}) {(- 1)}^{3} + {(- 1)}^{4})]$

Step 2.6.2

Multiply $4$ by $3$ .

$\frac{d}{d t} [- 6 t (625 x^{16} + 4 (125 x^{12}) \cdot - 1 + 6 {(5 x^{4})}^{2} {(- 1)}^{2} + 4 (5 x^{4}) {(- 1)}^{3} + {(- 1)}^{4})]$

Step 2.7

Multiply $125$ by $4$ .

$\frac{d}{d t} [- 6 t (625 x^{16} + 500 x^{12} \cdot - 1 + 6 {(5 x^{4})}^{2} {(- 1)}^{2} + 4 (5 x^{4}) {(- 1)}^{3} + {(- 1)}^{4})]$

Step 2.8

Multiply $- 1$ by $500$ .

$\frac{d}{d t} [- 6 t (625 x^{16} - 500 x^{12} + 6 {(5 x^{4})}^{2} {(- 1)}^{2} + 4 (5 x^{4}) {(- 1)}^{3} + {(- 1)}^{4})]$

Step 2.9

Apply the product rule to $5 x^{4}$ .

$\frac{d}{d t} [- 6 t (625 x^{16} - 500 x^{12} + 6 (5^{2} {(x^{4})}^{2}) {(- 1)}^{2} + 4 (5 x^{4}) {(- 1)}^{3} + {(- 1)}^{4})]$

Step 2.10

Raise $5$ to the power of $2$ .

$\frac{d}{d t} [- 6 t (625 x^{16} - 500 x^{12} + 6 (25 {(x^{4})}^{2}) {(- 1)}^{2} + 4 (5 x^{4}) {(- 1)}^{3} + {(- 1)}^{4})]$

Step 2.11

Multiply the exponents in ${(x^{4})}^{2}$ .

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Step 2.11.1

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

$\frac{d}{d t} [- 6 t (625 x^{16} - 500 x^{12} + 6 (25 x^{4 \cdot 2}) {(- 1)}^{2} + 4 (5 x^{4}) {(- 1)}^{3} + {(- 1)}^{4})]$

Step 2.11.2

Multiply $4$ by $2$ .

$\frac{d}{d t} [- 6 t (625 x^{16} - 500 x^{12} + 6 (25 x^{8}) {(- 1)}^{2} + 4 (5 x^{4}) {(- 1)}^{3} + {(- 1)}^{4})]$

Step 2.12

Multiply $25$ by $6$ .

$\frac{d}{d t} [- 6 t (625 x^{16} - 500 x^{12} + 150 x^{8} {(- 1)}^{2} + 4 (5 x^{4}) {(- 1)}^{3} + {(- 1)}^{4})]$

Step 2.13

Raise $- 1$ to the power of $2$ .

$\frac{d}{d t} [- 6 t (625 x^{16} - 500 x^{12} + 150 x^{8} \cdot 1 + 4 (5 x^{4}) {(- 1)}^{3} + {(- 1)}^{4})]$

Step 2.14

Multiply $150$ by $1$ .

$\frac{d}{d t} [- 6 t (625 x^{16} - 500 x^{12} + 150 x^{8} + 4 (5 x^{4}) {(- 1)}^{3} + {(- 1)}^{4})]$

Step 2.15

Multiply $5$ by $4$ .

$\frac{d}{d t} [- 6 t (625 x^{16} - 500 x^{12} + 150 x^{8} + 20 x^{4} {(- 1)}^{3} + {(- 1)}^{4})]$

Step 2.16

Raise $- 1$ to the power of $3$ .

$\frac{d}{d t} [- 6 t (625 x^{16} - 500 x^{12} + 150 x^{8} + 20 x^{4} \cdot - 1 + {(- 1)}^{4})]$

Step 2.17

Multiply $- 1$ by $20$ .

$\frac{d}{d t} [- 6 t (625 x^{16} - 500 x^{12} + 150 x^{8} - 20 x^{4} + {(- 1)}^{4})]$

Step 2.18

Raise $- 1$ to the power of $4$ .

$\frac{d}{d t} [- 6 t (625 x^{16} - 500 x^{12} + 150 x^{8} - 20 x^{4} + 1)]$

Step 3

Since $- 6 (625 x^{16} - 500 x^{12} + 150 x^{8} - 20 x^{4} + 1)$ is constant with respect to $t$ , the derivative of $- 6 t (625 x^{16} - 500 x^{12} + 150 x^{8} - 20 x^{4} + 1)$ with respect to $t$ is $- 6 (625 x^{16} - 500 x^{12} + 150 x^{8} - 20 x^{4} + 1) \frac{d}{d t} [t]$ .

$- 6 (625 x^{16} - 500 x^{12} + 150 x^{8} - 20 x^{4} + 1) \frac{d}{d t} [t]$

Step 4

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

$- 6 (625 x^{16} - 500 x^{12} + 150 x^{8} - 20 x^{4} + 1) \cdot 1$

Step 5

Multiply $- 6$ by $1$ .

$- 6 (625 x^{16} - 500 x^{12} + 150 x^{8} - 20 x^{4} + 1)$

Step 6

Simplify.

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Step 6.1

Apply the distributive property.

$- 6 (625 x^{16}) - 6 (- 500 x^{12}) - 6 (150 x^{8}) - 6 (- 20 x^{4}) - 6 \cdot 1$

Step 6.2

Combine terms.

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Step 6.2.1

Multiply $625$ by $- 6$ .

$- 3750 x^{16} - 6 (- 500 x^{12}) - 6 (150 x^{8}) - 6 (- 20 x^{4}) - 6 \cdot 1$

Step 6.2.2

Multiply $- 500$ by $- 6$ .

$- 3750 x^{16} + 3000 x^{12} - 6 (150 x^{8}) - 6 (- 20 x^{4}) - 6 \cdot 1$

Step 6.2.3

Multiply $150$ by $- 6$ .

$- 3750 x^{16} + 3000 x^{12} - 900 x^{8} - 6 (- 20 x^{4}) - 6 \cdot 1$

Step 6.2.4

Multiply $- 20$ by $- 6$ .

$- 3750 x^{16} + 3000 x^{12} - 900 x^{8} + 120 x^{4} - 6 \cdot 1$

Step 6.2.5

Multiply $- 6$ by $1$ .

$- 3750 x^{16} + 3000 x^{12} - 900 x^{8} + 120 x^{4} - 6$