Calculus Examples

$h (t) = \sqrt[4]{t} (\sqrt{t} + t)$

Step 1

Apply basic rules of exponents.

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Step 1.1

Use $\sqrt[n]{a^{x}} = a^{\frac{x}{n}}$ to rewrite $\sqrt[4]{t}$ as $t^{\frac{1}{4}}$ .

$\frac{d}{d t} [t^{\frac{1}{4}} (\sqrt{t} + t)]$

Step 1.2

Use $\sqrt[n]{a^{x}} = a^{\frac{x}{n}}$ to rewrite $\sqrt{t}$ as $t^{\frac{1}{2}}$ .

$\frac{d}{d t} [t^{\frac{1}{4}} (t^{\frac{1}{2}} + t)]$

Step 2

Differentiate using the Product Rule which states that $\frac{d}{d t} [f (t) g (t)]$ is $f (t) \frac{d}{d t} [g (t)] + g (t) \frac{d}{d t} [f (t)]$ where $f (t) = t^{\frac{1}{4}}$ and $g (t) = t^{\frac{1}{2}} + t$ .

$t^{\frac{1}{4}} \frac{d}{d t} [t^{\frac{1}{2}} + t] + (t^{\frac{1}{2}} + t) \frac{d}{d t} [t^{\frac{1}{4}}]$

Step 3

Differentiate.

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Step 3.1

By the Sum Rule, the derivative of $t^{\frac{1}{2}} + t$ with respect to $t$ is $\frac{d}{d t} [t^{\frac{1}{2}}] + \frac{d}{d t} [t]$ .

$t^{\frac{1}{4}} (\frac{d}{d t} [t^{\frac{1}{2}}] + \frac{d}{d t} [t]) + (t^{\frac{1}{2}} + t) \frac{d}{d t} [t^{\frac{1}{4}}]$

Step 3.2

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

$t^{\frac{1}{4}} (\frac{1}{2} t^{\frac{1}{2} - 1} + \frac{d}{d t} [t]) + (t^{\frac{1}{2}} + t) \frac{d}{d t} [t^{\frac{1}{4}}]$

Step 4

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

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

Step 5

Combine $- 1$ and $\frac{2}{2}$ .

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

Step 6

Combine the numerators over the common denominator.

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

Step 7

Simplify the numerator.

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Step 7.1

Multiply $- 1$ by $2$ .

$t^{\frac{1}{4}} (\frac{1}{2} t^{\frac{1 - 2}{2}} + \frac{d}{d t} [t]) + (t^{\frac{1}{2}} + t) \frac{d}{d t} [t^{\frac{1}{4}}]$

Step 7.2

Subtract $2$ from $1$ .

$t^{\frac{1}{4}} (\frac{1}{2} t^{\frac{- 1}{2}} + \frac{d}{d t} [t]) + (t^{\frac{1}{2}} + t) \frac{d}{d t} [t^{\frac{1}{4}}]$

Step 8

Combine fractions.

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Step 8.1

Move the negative in front of the fraction.

$t^{\frac{1}{4}} (\frac{1}{2} t^{- \frac{1}{2}} + \frac{d}{d t} [t]) + (t^{\frac{1}{2}} + t) \frac{d}{d t} [t^{\frac{1}{4}}]$

Step 8.2

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

$t^{\frac{1}{4}} (\frac{t^{- \frac{1}{2}}}{2} + \frac{d}{d t} [t]) + (t^{\frac{1}{2}} + t) \frac{d}{d t} [t^{\frac{1}{4}}]$

Step 8.3

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

$t^{\frac{1}{4}} (\frac{1}{2 t^{\frac{1}{2}}} + \frac{d}{d t} [t]) + (t^{\frac{1}{2}} + t) \frac{d}{d t} [t^{\frac{1}{4}}]$

Step 9

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

$t^{\frac{1}{4}} (\frac{1}{2 t^{\frac{1}{2}}} + 1) + (t^{\frac{1}{2}} + t) \frac{d}{d t} [t^{\frac{1}{4}}]$

Step 10

Differentiate using the Power Rule which states that $\frac{d}{d t} [t^{n}]$ is $n t^{n - 1}$ where $n = \frac{1}{4}$ .

$t^{\frac{1}{4}} (\frac{1}{2 t^{\frac{1}{2}}} + 1) + (t^{\frac{1}{2}} + t) (\frac{1}{4} t^{\frac{1}{4} - 1})$

Step 11

To write $- 1$ as a fraction with a common denominator, multiply by $\frac{4}{4}$ .

$t^{\frac{1}{4}} (\frac{1}{2 t^{\frac{1}{2}}} + 1) + (t^{\frac{1}{2}} + t) (\frac{1}{4} t^{\frac{1}{4} - 1 \cdot \frac{4}{4}})$

Step 12

Combine $- 1$ and $\frac{4}{4}$ .

$t^{\frac{1}{4}} (\frac{1}{2 t^{\frac{1}{2}}} + 1) + (t^{\frac{1}{2}} + t) (\frac{1}{4} t^{\frac{1}{4} + \frac{- 1 \cdot 4}{4}})$

Step 13

Combine the numerators over the common denominator.

$t^{\frac{1}{4}} (\frac{1}{2 t^{\frac{1}{2}}} + 1) + (t^{\frac{1}{2}} + t) (\frac{1}{4} t^{\frac{1 - 1 \cdot 4}{4}})$

Step 14

Simplify the numerator.

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Step 14.1

Multiply $- 1$ by $4$ .

$t^{\frac{1}{4}} (\frac{1}{2 t^{\frac{1}{2}}} + 1) + (t^{\frac{1}{2}} + t) (\frac{1}{4} t^{\frac{1 - 4}{4}})$

Step 14.2

Subtract $4$ from $1$ .

$t^{\frac{1}{4}} (\frac{1}{2 t^{\frac{1}{2}}} + 1) + (t^{\frac{1}{2}} + t) (\frac{1}{4} t^{\frac{- 3}{4}})$

Step 15

Move the negative in front of the fraction.

$t^{\frac{1}{4}} (\frac{1}{2 t^{\frac{1}{2}}} + 1) + (t^{\frac{1}{2}} + t) (\frac{1}{4} t^{- \frac{3}{4}})$

Step 16

Combine $\frac{1}{4}$ and $t^{- \frac{3}{4}}$ .

$t^{\frac{1}{4}} (\frac{1}{2 t^{\frac{1}{2}}} + 1) + (t^{\frac{1}{2}} + t) \frac{t^{- \frac{3}{4}}}{4}$

Step 17

Move $t^{- \frac{3}{4}}$ to the denominator using the negative exponent rule $b^{- n} = \frac{1}{b^{n}}$ .

$t^{\frac{1}{4}} (\frac{1}{2 t^{\frac{1}{2}}} + 1) + (t^{\frac{1}{2}} + t) \frac{1}{4 t^{\frac{3}{4}}}$

Step 18

Simplify.

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Step 18.1

Apply the distributive property.

$t^{\frac{1}{4}} \frac{1}{2 t^{\frac{1}{2}}} + t^{\frac{1}{4}} \cdot 1 + (t^{\frac{1}{2}} + t) \frac{1}{4 t^{\frac{3}{4}}}$

Step 18.2

Apply the distributive property.

$t^{\frac{1}{4}} \frac{1}{2 t^{\frac{1}{2}}} + t^{\frac{1}{4}} \cdot 1 + t^{\frac{1}{2}} \frac{1}{4 t^{\frac{3}{4}}} + t \frac{1}{4 t^{\frac{3}{4}}}$

Step 18.3

Combine terms.

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Step 18.3.1

Combine $t^{\frac{1}{4}}$ and $\frac{1}{2 t^{\frac{1}{2}}}$ .

$\frac{t^{\frac{1}{4}}}{2 t^{\frac{1}{2}}} + t^{\frac{1}{4}} \cdot 1 + t^{\frac{1}{2}} \frac{1}{4 t^{\frac{3}{4}}} + t \frac{1}{4 t^{\frac{3}{4}}}$

Step 18.3.2

Move $t^{\frac{1}{4}}$ to the denominator using the negative exponent rule $b^{n} = \frac{1}{b^{- n}}$ .

$\frac{1}{2 t^{\frac{1}{2}} t^{- \frac{1}{4}}} + t^{\frac{1}{4}} \cdot 1 + t^{\frac{1}{2}} \frac{1}{4 t^{\frac{3}{4}}} + t \frac{1}{4 t^{\frac{3}{4}}}$

Step 18.3.3

Multiply $t^{\frac{1}{2}}$ by $t^{- \frac{1}{4}}$ by adding the exponents.

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Step 18.3.3.1

Move $t^{- \frac{1}{4}}$ .

$\frac{1}{2 (t^{- \frac{1}{4}} t^{\frac{1}{2}})} + t^{\frac{1}{4}} \cdot 1 + t^{\frac{1}{2}} \frac{1}{4 t^{\frac{3}{4}}} + t \frac{1}{4 t^{\frac{3}{4}}}$

Step 18.3.3.2

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

$\frac{1}{2 t^{- \frac{1}{4} + \frac{1}{2}}} + t^{\frac{1}{4}} \cdot 1 + t^{\frac{1}{2}} \frac{1}{4 t^{\frac{3}{4}}} + t \frac{1}{4 t^{\frac{3}{4}}}$

Step 18.3.3.3

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

$\frac{1}{2 t^{- \frac{1}{4} + \frac{1}{2} \cdot \frac{2}{2}}} + t^{\frac{1}{4}} \cdot 1 + t^{\frac{1}{2}} \frac{1}{4 t^{\frac{3}{4}}} + t \frac{1}{4 t^{\frac{3}{4}}}$

Step 18.3.3.4

Write each expression with a common denominator of $4$ , by multiplying each by an appropriate factor of $1$ .

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Step 18.3.3.4.1

Multiply $\frac{1}{2}$ by $\frac{2}{2}$ .

$\frac{1}{2 t^{- \frac{1}{4} + \frac{2}{2 \cdot 2}}} + t^{\frac{1}{4}} \cdot 1 + t^{\frac{1}{2}} \frac{1}{4 t^{\frac{3}{4}}} + t \frac{1}{4 t^{\frac{3}{4}}}$

Step 18.3.3.4.2

Multiply $2$ by $2$ .

$\frac{1}{2 t^{- \frac{1}{4} + \frac{2}{4}}} + t^{\frac{1}{4}} \cdot 1 + t^{\frac{1}{2}} \frac{1}{4 t^{\frac{3}{4}}} + t \frac{1}{4 t^{\frac{3}{4}}}$

Step 18.3.3.5

Combine the numerators over the common denominator.

$\frac{1}{2 t^{\frac{- 1 + 2}{4}}} + t^{\frac{1}{4}} \cdot 1 + t^{\frac{1}{2}} \frac{1}{4 t^{\frac{3}{4}}} + t \frac{1}{4 t^{\frac{3}{4}}}$

Step 18.3.3.6

Add $- 1$ and $2$ .

$\frac{1}{2 t^{\frac{1}{4}}} + t^{\frac{1}{4}} \cdot 1 + t^{\frac{1}{2}} \frac{1}{4 t^{\frac{3}{4}}} + t \frac{1}{4 t^{\frac{3}{4}}}$

Step 18.3.4

Multiply $t^{\frac{1}{4}}$ by $1$ .

$\frac{1}{2 t^{\frac{1}{4}}} + t^{\frac{1}{4}} + t^{\frac{1}{2}} \frac{1}{4 t^{\frac{3}{4}}} + t \frac{1}{4 t^{\frac{3}{4}}}$

Step 18.3.5

Combine $t^{\frac{1}{2}}$ and $\frac{1}{4 t^{\frac{3}{4}}}$ .

$\frac{1}{2 t^{\frac{1}{4}}} + t^{\frac{1}{4}} + \frac{t^{\frac{1}{2}}}{4 t^{\frac{3}{4}}} + t \frac{1}{4 t^{\frac{3}{4}}}$

Step 18.3.6

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

$\frac{1}{2 t^{\frac{1}{4}}} + t^{\frac{1}{4}} + \frac{1}{4 t^{\frac{3}{4}} t^{- \frac{1}{2}}} + t \frac{1}{4 t^{\frac{3}{4}}}$

Step 18.3.7

Multiply $t^{\frac{3}{4}}$ by $t^{- \frac{1}{2}}$ by adding the exponents.

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Step 18.3.7.1

Move $t^{- \frac{1}{2}}$ .

$\frac{1}{2 t^{\frac{1}{4}}} + t^{\frac{1}{4}} + \frac{1}{4 (t^{- \frac{1}{2}} t^{\frac{3}{4}})} + t \frac{1}{4 t^{\frac{3}{4}}}$

Step 18.3.7.2

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

$\frac{1}{2 t^{\frac{1}{4}}} + t^{\frac{1}{4}} + \frac{1}{4 t^{- \frac{1}{2} + \frac{3}{4}}} + t \frac{1}{4 t^{\frac{3}{4}}}$

Step 18.3.7.3

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

$\frac{1}{2 t^{\frac{1}{4}}} + t^{\frac{1}{4}} + \frac{1}{4 t^{- \frac{1}{2} \cdot \frac{2}{2} + \frac{3}{4}}} + t \frac{1}{4 t^{\frac{3}{4}}}$

Step 18.3.7.4

Write each expression with a common denominator of $4$ , by multiplying each by an appropriate factor of $1$ .

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Step 18.3.7.4.1

Multiply $\frac{1}{2}$ by $\frac{2}{2}$ .

$\frac{1}{2 t^{\frac{1}{4}}} + t^{\frac{1}{4}} + \frac{1}{4 t^{- \frac{2}{2 \cdot 2} + \frac{3}{4}}} + t \frac{1}{4 t^{\frac{3}{4}}}$

Step 18.3.7.4.2

Multiply $2$ by $2$ .

$\frac{1}{2 t^{\frac{1}{4}}} + t^{\frac{1}{4}} + \frac{1}{4 t^{- \frac{2}{4} + \frac{3}{4}}} + t \frac{1}{4 t^{\frac{3}{4}}}$

Step 18.3.7.5

Combine the numerators over the common denominator.

$\frac{1}{2 t^{\frac{1}{4}}} + t^{\frac{1}{4}} + \frac{1}{4 t^{\frac{- 2 + 3}{4}}} + t \frac{1}{4 t^{\frac{3}{4}}}$

Step 18.3.7.6

Add $- 2$ and $3$ .

$\frac{1}{2 t^{\frac{1}{4}}} + t^{\frac{1}{4}} + \frac{1}{4 t^{\frac{1}{4}}} + t \frac{1}{4 t^{\frac{3}{4}}}$

Step 18.3.8

Combine $t$ and $\frac{1}{4 t^{\frac{3}{4}}}$ .

$\frac{1}{2 t^{\frac{1}{4}}} + t^{\frac{1}{4}} + \frac{1}{4 t^{\frac{1}{4}}} + \frac{t}{4 t^{\frac{3}{4}}}$

Step 18.3.9

Move $t^{\frac{3}{4}}$ to the numerator using the negative exponent rule $\frac{1}{b^{n}} = b^{- n}$ .

$\frac{1}{2 t^{\frac{1}{4}}} + t^{\frac{1}{4}} + \frac{1}{4 t^{\frac{1}{4}}} + \frac{t \cdot t^{- \frac{3}{4}}}{4}$

Step 18.3.10

Multiply $t$ by $t^{- \frac{3}{4}}$ by adding the exponents.

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Step 18.3.10.1

Multiply $t$ by $t^{- \frac{3}{4}}$ .

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Step 18.3.10.1.1

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

$\frac{1}{2 t^{\frac{1}{4}}} + t^{\frac{1}{4}} + \frac{1}{4 t^{\frac{1}{4}}} + \frac{t^{1} t^{- \frac{3}{4}}}{4}$

Step 18.3.10.1.2

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

$\frac{1}{2 t^{\frac{1}{4}}} + t^{\frac{1}{4}} + \frac{1}{4 t^{\frac{1}{4}}} + \frac{t^{1 - \frac{3}{4}}}{4}$

Step 18.3.10.2

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

$\frac{1}{2 t^{\frac{1}{4}}} + t^{\frac{1}{4}} + \frac{1}{4 t^{\frac{1}{4}}} + \frac{t^{\frac{4}{4} - \frac{3}{4}}}{4}$

Step 18.3.10.3

Combine the numerators over the common denominator.

$\frac{1}{2 t^{\frac{1}{4}}} + t^{\frac{1}{4}} + \frac{1}{4 t^{\frac{1}{4}}} + \frac{t^{\frac{4 - 3}{4}}}{4}$

Step 18.3.10.4

Subtract $3$ from $4$ .

$\frac{1}{2 t^{\frac{1}{4}}} + t^{\frac{1}{4}} + \frac{1}{4 t^{\frac{1}{4}}} + \frac{t^{\frac{1}{4}}}{4}$

Step 18.3.11

To write $\frac{1}{2 t^{\frac{1}{4}}}$ as a fraction with a common denominator, multiply by $\frac{2}{2}$ .

$t^{\frac{1}{4}} + \frac{1}{2 t^{\frac{1}{4}}} \cdot \frac{2}{2} + \frac{1}{4 t^{\frac{1}{4}}} + \frac{t^{\frac{1}{4}}}{4}$

Step 18.3.12

Write each expression with a common denominator of $4 t^{\frac{1}{4}}$ , by multiplying each by an appropriate factor of $1$ .

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Step 18.3.12.1

Multiply $\frac{1}{2 t^{\frac{1}{4}}}$ by $\frac{2}{2}$ .

$t^{\frac{1}{4}} + \frac{2}{2 t^{\frac{1}{4}} \cdot 2} + \frac{1}{4 t^{\frac{1}{4}}} + \frac{t^{\frac{1}{4}}}{4}$

Step 18.3.12.2

Multiply $2$ by $2$ .

$t^{\frac{1}{4}} + \frac{2}{4 t^{\frac{1}{4}}} + \frac{1}{4 t^{\frac{1}{4}}} + \frac{t^{\frac{1}{4}}}{4}$

Step 18.3.13

Combine the numerators over the common denominator.

$t^{\frac{1}{4}} + \frac{2 + 1}{4 t^{\frac{1}{4}}} + \frac{t^{\frac{1}{4}}}{4}$

Step 18.3.14

Add $2$ and $1$ .

$t^{\frac{1}{4}} + \frac{3}{4 t^{\frac{1}{4}}} + \frac{t^{\frac{1}{4}}}{4}$

Step 18.3.15

To write $t^{\frac{1}{4}}$ as a fraction with a common denominator, multiply by $\frac{4}{4}$ .

$t^{\frac{1}{4}} \cdot \frac{4}{4} + \frac{t^{\frac{1}{4}}}{4} + \frac{3}{4 t^{\frac{1}{4}}}$

Step 18.3.16

Combine $t^{\frac{1}{4}}$ and $\frac{4}{4}$ .

$\frac{t^{\frac{1}{4}} \cdot 4}{4} + \frac{t^{\frac{1}{4}}}{4} + \frac{3}{4 t^{\frac{1}{4}}}$

Step 18.3.17

Combine the numerators over the common denominator.

$\frac{t^{\frac{1}{4}} \cdot 4 + t^{\frac{1}{4}}}{4} + \frac{3}{4 t^{\frac{1}{4}}}$

Step 18.3.18

Move $4$ to the left of $t^{\frac{1}{4}}$ .

$\frac{4 \cdot t^{\frac{1}{4}} + t^{\frac{1}{4}}}{4} + \frac{3}{4 t^{\frac{1}{4}}}$

Step 18.3.19

Add $4 t^{\frac{1}{4}}$ and $t^{\frac{1}{4}}$ .

$\frac{5 t^{\frac{1}{4}}}{4} + \frac{3}{4 t^{\frac{1}{4}}}$