Calculus Examples

$\frac{\sqrt[3]{t}}{t - 9}$

Step 1

Use $\sqrt[n]{a^{x}} = a^{\frac{x}{n}}$ to rewrite $\sqrt[3]{t}$ as $t^{\frac{1}{3}}$ .

$\frac{d}{d t} [\frac{t^{\frac{1}{3}}}{t - 9}]$

Step 2

Differentiate using the Quotient Rule which states that $\frac{d}{d t} [\frac{f (t)}{g (t)}]$ is $\frac{g (t) \frac{d}{d t} [f (t)] - f (t) \frac{d}{d t} [g (t)]}{{g (t)}^{2}}$ where $f (t) = t^{\frac{1}{3}}$ and $g (t) = t - 9$ .

$\frac{(t - 9) \frac{d}{d t} [t^{\frac{1}{3}}] - t^{\frac{1}{3}} \frac{d}{d t} [t - 9]}{{(t - 9)}^{2}}$

Step 3

Differentiate using the Power Rule which states that $\frac{d}{d t} [t^{n}]$ is $n t^{n - 1}$ where $n = \frac{1}{3}$ .

$\frac{(t - 9) (\frac{1}{3} t^{\frac{1}{3} - 1}) - t^{\frac{1}{3}} \frac{d}{d t} [t - 9]}{{(t - 9)}^{2}}$

Step 4

To write $- 1$ as a fraction with a common denominator, multiply by $\frac{3}{3}$ .

$\frac{(t - 9) (\frac{1}{3} t^{\frac{1}{3} - 1 \cdot \frac{3}{3}}) - t^{\frac{1}{3}} \frac{d}{d t} [t - 9]}{{(t - 9)}^{2}}$

Step 5

Combine $- 1$ and $\frac{3}{3}$ .

$\frac{(t - 9) (\frac{1}{3} t^{\frac{1}{3} + \frac{- 1 \cdot 3}{3}}) - t^{\frac{1}{3}} \frac{d}{d t} [t - 9]}{{(t - 9)}^{2}}$

Step 6

Combine the numerators over the common denominator.

$\frac{(t - 9) (\frac{1}{3} t^{\frac{1 - 1 \cdot 3}{3}}) - t^{\frac{1}{3}} \frac{d}{d t} [t - 9]}{{(t - 9)}^{2}}$

Step 7

Simplify the numerator.

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Step 7.1

Multiply $- 1$ by $3$ .

$\frac{(t - 9) (\frac{1}{3} t^{\frac{1 - 3}{3}}) - t^{\frac{1}{3}} \frac{d}{d t} [t - 9]}{{(t - 9)}^{2}}$

Step 7.2

Subtract $3$ from $1$ .

$\frac{(t - 9) (\frac{1}{3} t^{\frac{- 2}{3}}) - t^{\frac{1}{3}} \frac{d}{d t} [t - 9]}{{(t - 9)}^{2}}$

Step 8

Combine fractions.

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Step 8.1

Move the negative in front of the fraction.

$\frac{(t - 9) (\frac{1}{3} t^{- \frac{2}{3}}) - t^{\frac{1}{3}} \frac{d}{d t} [t - 9]}{{(t - 9)}^{2}}$

Step 8.2

Combine $\frac{1}{3}$ and $t^{- \frac{2}{3}}$ .

$\frac{(t - 9) \frac{t^{- \frac{2}{3}}}{3} - t^{\frac{1}{3}} \frac{d}{d t} [t - 9]}{{(t - 9)}^{2}}$

Step 8.3

Move $t^{- \frac{2}{3}}$ to the denominator using the negative exponent rule $b^{- n} = \frac{1}{b^{n}}$ .

$\frac{(t - 9) \frac{1}{3 t^{\frac{2}{3}}} - t^{\frac{1}{3}} \frac{d}{d t} [t - 9]}{{(t - 9)}^{2}}$

Step 9

By the Sum Rule, the derivative of $t - 9$ with respect to $t$ is $\frac{d}{d t} [t] + \frac{d}{d t} [- 9]$ .

$\frac{(t - 9) \frac{1}{3 t^{\frac{2}{3}}} - t^{\frac{1}{3}} (\frac{d}{d t} [t] + \frac{d}{d t} [- 9])}{{(t - 9)}^{2}}$

Step 10

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

$\frac{(t - 9) \frac{1}{3 t^{\frac{2}{3}}} - t^{\frac{1}{3}} (1 + \frac{d}{d t} [- 9])}{{(t - 9)}^{2}}$

Step 11

Since $- 9$ is constant with respect to $t$ , the derivative of $- 9$ with respect to $t$ is $0$ .

$\frac{(t - 9) \frac{1}{3 t^{\frac{2}{3}}} - t^{\frac{1}{3}} (1 + 0)}{{(t - 9)}^{2}}$

Step 12

Simplify the expression.

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Step 12.1

Add $1$ and $0$ .

$\frac{(t - 9) \frac{1}{3 t^{\frac{2}{3}}} - t^{\frac{1}{3}} \cdot 1}{{(t - 9)}^{2}}$

Step 12.2

Multiply $- 1$ by $1$ .

$\frac{(t - 9) \frac{1}{3 t^{\frac{2}{3}}} - t^{\frac{1}{3}}}{{(t - 9)}^{2}}$

Step 13

Simplify.

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Step 13.1

Apply the distributive property.

$\frac{t \frac{1}{3 t^{\frac{2}{3}}} - 9 \frac{1}{3 t^{\frac{2}{3}}} - t^{\frac{1}{3}}}{{(t - 9)}^{2}}$

Step 13.2

Simplify the numerator.

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Step 13.2.1

Simplify each term.

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Step 13.2.1.1

Combine $t$ and $\frac{1}{3 t^{\frac{2}{3}}}$ .

$\frac{\frac{t}{3 t^{\frac{2}{3}}} - 9 \frac{1}{3 t^{\frac{2}{3}}} - t^{\frac{1}{3}}}{{(t - 9)}^{2}}$

Step 13.2.1.2

Move $t^{\frac{2}{3}}$ to the numerator using the negative exponent rule $\frac{1}{b^{n}} = b^{- n}$ .

$\frac{\frac{t \cdot t^{- \frac{2}{3}}}{3} - 9 \frac{1}{3 t^{\frac{2}{3}}} - t^{\frac{1}{3}}}{{(t - 9)}^{2}}$

Step 13.2.1.3

Multiply $t$ by $t^{- \frac{2}{3}}$ by adding the exponents.

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Step 13.2.1.3.1

Multiply $t$ by $t^{- \frac{2}{3}}$ .

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Step 13.2.1.3.1.1

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

$\frac{\frac{t^{1} t^{- \frac{2}{3}}}{3} - 9 \frac{1}{3 t^{\frac{2}{3}}} - t^{\frac{1}{3}}}{{(t - 9)}^{2}}$

Step 13.2.1.3.1.2

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

$\frac{\frac{t^{1 - \frac{2}{3}}}{3} - 9 \frac{1}{3 t^{\frac{2}{3}}} - t^{\frac{1}{3}}}{{(t - 9)}^{2}}$

Step 13.2.1.3.2

Write $1$ as a fraction with a common denominator.

$\frac{\frac{t^{\frac{3}{3} - \frac{2}{3}}}{3} - 9 \frac{1}{3 t^{\frac{2}{3}}} - t^{\frac{1}{3}}}{{(t - 9)}^{2}}$

Step 13.2.1.3.3

Combine the numerators over the common denominator.

$\frac{\frac{t^{\frac{3 - 2}{3}}}{3} - 9 \frac{1}{3 t^{\frac{2}{3}}} - t^{\frac{1}{3}}}{{(t - 9)}^{2}}$

Step 13.2.1.3.4

Subtract $2$ from $3$ .

$\frac{\frac{t^{\frac{1}{3}}}{3} - 9 \frac{1}{3 t^{\frac{2}{3}}} - t^{\frac{1}{3}}}{{(t - 9)}^{2}}$

Step 13.2.1.4

Cancel the common factor of $3$ .

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Step 13.2.1.4.1

Factor $3$ out of $- 9$ .

$\frac{\frac{t^{\frac{1}{3}}}{3} + 3 \cdot - 3 \frac{1}{3 t^{\frac{2}{3}}} - t^{\frac{1}{3}}}{{(t - 9)}^{2}}$

Step 13.2.1.4.2

Cancel the common factor.

$\frac{\frac{t^{\frac{1}{3}}}{3} + 3 \cdot - 3 \frac{1}{3 t^{\frac{2}{3}}} - t^{\frac{1}{3}}}{{(t - 9)}^{2}}$

Step 13.2.1.4.3

Rewrite the expression.

$\frac{\frac{t^{\frac{1}{3}}}{3} - 3 \frac{1}{t^{\frac{2}{3}}} - t^{\frac{1}{3}}}{{(t - 9)}^{2}}$

Step 13.2.1.5

Combine $- 3$ and $\frac{1}{t^{\frac{2}{3}}}$ .

$\frac{\frac{t^{\frac{1}{3}}}{3} + \frac{- 3}{t^{\frac{2}{3}}} - t^{\frac{1}{3}}}{{(t - 9)}^{2}}$

Step 13.2.1.6

Move the negative in front of the fraction.

$\frac{\frac{t^{\frac{1}{3}}}{3} - \frac{3}{t^{\frac{2}{3}}} - t^{\frac{1}{3}}}{{(t - 9)}^{2}}$

Step 13.2.2

To write $- t^{\frac{1}{3}}$ as a fraction with a common denominator, multiply by $\frac{3}{3}$ .

$\frac{\frac{t^{\frac{1}{3}}}{3} - t^{\frac{1}{3}} \cdot \frac{3}{3} - \frac{3}{t^{\frac{2}{3}}}}{{(t - 9)}^{2}}$

Step 13.2.3

Combine $- t^{\frac{1}{3}}$ and $\frac{3}{3}$ .

$\frac{\frac{t^{\frac{1}{3}}}{3} + \frac{- t^{\frac{1}{3}} \cdot 3}{3} - \frac{3}{t^{\frac{2}{3}}}}{{(t - 9)}^{2}}$

Step 13.2.4

Combine the numerators over the common denominator.

$\frac{\frac{t^{\frac{1}{3}} - t^{\frac{1}{3}} \cdot 3}{3} - \frac{3}{t^{\frac{2}{3}}}}{{(t - 9)}^{2}}$

Step 13.2.5

Simplify each term.

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Step 13.2.5.1

Simplify the numerator.

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Step 13.2.5.1.1

Factor $t^{\frac{1}{3}}$ out of $t^{\frac{1}{3}} - t^{\frac{1}{3}} \cdot 3$ .

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Step 13.2.5.1.1.1

Move $t^{\frac{1}{3}}$ .

$\frac{\frac{t^{\frac{1}{3}} - 1 \cdot 3 t^{\frac{1}{3}}}{3} - \frac{3}{t^{\frac{2}{3}}}}{{(t - 9)}^{2}}$

Step 13.2.5.1.1.2

Multiply by $1$ .

$\frac{\frac{t^{\frac{1}{3}} \cdot 1 - 1 \cdot 3 t^{\frac{1}{3}}}{3} - \frac{3}{t^{\frac{2}{3}}}}{{(t - 9)}^{2}}$

Step 13.2.5.1.1.3

Factor $t^{\frac{1}{3}}$ out of $- 1 \cdot 3 t^{\frac{1}{3}}$ .

$\frac{\frac{t^{\frac{1}{3}} \cdot 1 + t^{\frac{1}{3}} (- 1 \cdot 3)}{3} - \frac{3}{t^{\frac{2}{3}}}}{{(t - 9)}^{2}}$

Step 13.2.5.1.1.4

Factor $t^{\frac{1}{3}}$ out of $t^{\frac{1}{3}} \cdot 1 + t^{\frac{1}{3}} (- 1 \cdot 3)$ .

$\frac{\frac{t^{\frac{1}{3}} (1 - 1 \cdot 3)}{3} - \frac{3}{t^{\frac{2}{3}}}}{{(t - 9)}^{2}}$

Step 13.2.5.1.2

Multiply $- 1$ by $3$ .

$\frac{\frac{t^{\frac{1}{3}} (1 - 3)}{3} - \frac{3}{t^{\frac{2}{3}}}}{{(t - 9)}^{2}}$

Step 13.2.5.1.3

Subtract $3$ from $1$ .

$\frac{\frac{t^{\frac{1}{3}} \cdot - 2}{3} - \frac{3}{t^{\frac{2}{3}}}}{{(t - 9)}^{2}}$

Step 13.2.5.2

Move $- 2$ to the left of $t^{\frac{1}{3}}$ .

$\frac{\frac{- 2 \cdot t^{\frac{1}{3}}}{3} - \frac{3}{t^{\frac{2}{3}}}}{{(t - 9)}^{2}}$

Step 13.2.5.3

Move the negative in front of the fraction.

$\frac{- \frac{2 t^{\frac{1}{3}}}{3} - \frac{3}{t^{\frac{2}{3}}}}{{(t - 9)}^{2}}$

Step 13.3

Simplify the numerator.

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Step 13.3.1

Factor $- 1$ out of $- \frac{2 t^{\frac{1}{3}}}{3} - \frac{3}{t^{\frac{2}{3}}}$ .

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Step 13.3.1.1

Factor $- 1$ out of $- \frac{2 t^{\frac{1}{3}}}{3}$ .

$\frac{- (\frac{2 t^{\frac{1}{3}}}{3}) - \frac{3}{t^{\frac{2}{3}}}}{{(t - 9)}^{2}}$

Step 13.3.1.2

Factor $- 1$ out of $- \frac{3}{t^{\frac{2}{3}}}$ .

$\frac{- (\frac{2 t^{\frac{1}{3}}}{3}) - (\frac{3}{t^{\frac{2}{3}}})}{{(t - 9)}^{2}}$

Step 13.3.1.3

Factor $- 1$ out of $- (\frac{2 t^{\frac{1}{3}}}{3}) - (\frac{3}{t^{\frac{2}{3}}})$ .

$\frac{- (\frac{2 t^{\frac{1}{3}}}{3} + \frac{3}{t^{\frac{2}{3}}})}{{(t - 9)}^{2}}$

Step 13.3.2

To write $\frac{2 t^{\frac{1}{3}}}{3}$ as a fraction with a common denominator, multiply by $\frac{t^{\frac{2}{3}}}{t^{\frac{2}{3}}}$ .

$\frac{- (\frac{2 t^{\frac{1}{3}}}{3} \cdot \frac{t^{\frac{2}{3}}}{t^{\frac{2}{3}}} + \frac{3}{t^{\frac{2}{3}}})}{{(t - 9)}^{2}}$

Step 13.3.3

To write $\frac{3}{t^{\frac{2}{3}}}$ as a fraction with a common denominator, multiply by $\frac{3}{3}$ .

$\frac{- (\frac{2 t^{\frac{1}{3}}}{3} \cdot \frac{t^{\frac{2}{3}}}{t^{\frac{2}{3}}} + \frac{3}{t^{\frac{2}{3}}} \cdot \frac{3}{3})}{{(t - 9)}^{2}}$

Step 13.3.4

Write each expression with a common denominator of $3 t^{\frac{2}{3}}$ , by multiplying each by an appropriate factor of $1$ .

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Step 13.3.4.1

Multiply $\frac{2 t^{\frac{1}{3}}}{3}$ by $\frac{t^{\frac{2}{3}}}{t^{\frac{2}{3}}}$ .

$\frac{- (\frac{2 t^{\frac{1}{3}} t^{\frac{2}{3}}}{3 t^{\frac{2}{3}}} + \frac{3}{t^{\frac{2}{3}}} \cdot \frac{3}{3})}{{(t - 9)}^{2}}$

Step 13.3.4.2

Multiply $\frac{3}{t^{\frac{2}{3}}}$ by $\frac{3}{3}$ .

$\frac{- (\frac{2 t^{\frac{1}{3}} t^{\frac{2}{3}}}{3 t^{\frac{2}{3}}} + \frac{3 \cdot 3}{t^{\frac{2}{3}} \cdot 3})}{{(t - 9)}^{2}}$

Step 13.3.4.3

Reorder the factors of $t^{\frac{2}{3}} \cdot 3$ .

$\frac{- (\frac{2 t^{\frac{1}{3}} t^{\frac{2}{3}}}{3 t^{\frac{2}{3}}} + \frac{3 \cdot 3}{3 t^{\frac{2}{3}}})}{{(t - 9)}^{2}}$

Step 13.3.5

Combine the numerators over the common denominator.

$\frac{- \frac{2 t^{\frac{1}{3}} t^{\frac{2}{3}} + 3 \cdot 3}{3 t^{\frac{2}{3}}}}{{(t - 9)}^{2}}$

Step 13.3.6

Simplify the numerator.

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Step 13.3.6.1

Multiply $t^{\frac{1}{3}}$ by $t^{\frac{2}{3}}$ by adding the exponents.

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Step 13.3.6.1.1

Move $t^{\frac{2}{3}}$ .

$\frac{- \frac{2 (t^{\frac{2}{3}} t^{\frac{1}{3}}) + 3 \cdot 3}{3 t^{\frac{2}{3}}}}{{(t - 9)}^{2}}$

Step 13.3.6.1.2

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

$\frac{- \frac{2 t^{\frac{2}{3} + \frac{1}{3}} + 3 \cdot 3}{3 t^{\frac{2}{3}}}}{{(t - 9)}^{2}}$

Step 13.3.6.1.3

Combine the numerators over the common denominator.

$\frac{- \frac{2 t^{\frac{2 + 1}{3}} + 3 \cdot 3}{3 t^{\frac{2}{3}}}}{{(t - 9)}^{2}}$

Step 13.3.6.1.4

Add $2$ and $1$ .

$\frac{- \frac{2 t^{\frac{3}{3}} + 3 \cdot 3}{3 t^{\frac{2}{3}}}}{{(t - 9)}^{2}}$

Step 13.3.6.1.5

Divide $3$ by $3$ .

$\frac{- \frac{2 t^{1} + 3 \cdot 3}{3 t^{\frac{2}{3}}}}{{(t - 9)}^{2}}$

Step 13.3.6.2

Simplify $2 t^{1}$ .

$\frac{- \frac{2 t + 3 \cdot 3}{3 t^{\frac{2}{3}}}}{{(t - 9)}^{2}}$

Step 13.3.6.3

Multiply $3$ by $3$ .

$\frac{- \frac{2 t + 9}{3 t^{\frac{2}{3}}}}{{(t - 9)}^{2}}$

Step 13.4

Multiply the numerator by the reciprocal of the denominator.

$- \frac{2 t + 9}{3 t^{\frac{2}{3}}} \cdot \frac{1}{{(t - 9)}^{2}}$

Step 13.5

Multiply $\frac{1}{{(t - 9)}^{2}}$ by $\frac{2 t + 9}{3 t^{\frac{2}{3}}}$ .

$- \frac{2 t + 9}{{(t - 9)}^{2} (3 t^{\frac{2}{3}})}$

Step 13.6

Move $3$ to the left of ${(t - 9)}^{2}$ .

$- \frac{2 t + 9}{3 \cdot {(t - 9)}^{2} t^{\frac{2}{3}}}$

Step 13.7

Reorder factors in $- \frac{2 t + 9}{3 {(t - 9)}^{2} t^{\frac{2}{3}}}$ .

$- \frac{2 t + 9}{3 t^{\frac{2}{3}} {(t - 9)}^{2}}$