Calculus Examples

$s = t^{2} \ln (| t |)$

Step 1

Differentiate both sides of the equation.

$\frac{d}{d t} (s) = \frac{d}{d t} (t^{2} \ln (| t |))$

Step 2

The derivative of $s$ with respect to $t$ is $s'$ .

$s'$

Step 3

Differentiate the right side of the equation.

Tap for more steps...

Step 3.1

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 $f (t) = t^{2}$ and $g (t) = \ln (| t |)$ .

$t^{2} \frac{d}{d t} [\ln (| t |)] + \ln (| t |) \frac{d}{d t} [t^{2}]$

Step 3.2

Differentiate using the chain rule, which states that $\frac{d}{d t} [f (g (t))]$ is $f' (g (t)) g' (t)$ where $f (t) = \ln (t)$ and $g (t) = | t |$ .

Tap for more steps...

Step 3.2.1

To apply the Chain Rule, set $u$ as $| t |$ .

$t^{2} (\frac{d}{d u} [\ln (u)] \frac{d}{d t} [| t |]) + \ln (| t |) \frac{d}{d t} [t^{2}]$

Step 3.2.2

The derivative of $\ln (u)$ with respect to $u$ is $\frac{1}{u}$ .

$t^{2} (\frac{1}{u} \frac{d}{d t} [| t |]) + \ln (| t |) \frac{d}{d t} [t^{2}]$

Step 3.2.3

Replace all occurrences of $u$ with $| t |$ .

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

Step 3.3

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

$\frac{t^{2}}{| t |} \frac{d}{d t} [| t |] + \ln (| t |) \frac{d}{d t} [t^{2}]$

Step 3.4

The derivative of $| t |$ with respect to $t$ is $\frac{t}{| t |}$ .

$\frac{t^{2}}{| t |} \cdot \frac{t}{| t |} + \ln (| t |) \frac{d}{d t} [t^{2}]$

Step 3.5

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

$\frac{t^{2} t}{| t | | t |} + \ln (| t |) \frac{d}{d t} [t^{2}]$

Step 3.6

Multiply $t^{2}$ by $t$ by adding the exponents.

Tap for more steps...

Step 3.6.1

Multiply $t^{2}$ by $t$ .

Tap for more steps...

Step 3.6.1.1

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

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

Step 3.6.1.2

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

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

Step 3.6.2

Add $2$ and $1$ .

$\frac{t^{3}}{| t | | t |} + \ln (| t |) \frac{d}{d t} [t^{2}]$

Step 3.7

To multiply absolute values, multiply the terms inside each absolute value.

$\frac{t^{3}}{| t \cdot t |} + \ln (| t |) \frac{d}{d t} [t^{2}]$

Step 3.8

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

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

Step 3.9

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

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

Step 3.10

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

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

Step 3.11

Add $1$ and $1$ .

$\frac{t^{3}}{| t^{2} |} + \ln (| t |) \frac{d}{d t} [t^{2}]$

Step 3.12

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

$\frac{t^{3}}{| t^{2} |} + \ln (| t |) (2 t)$

Step 3.13

Simplify.

Tap for more steps...

Step 3.13.1

Reorder terms.

$\frac{t^{3}}{| t^{2} |} + 2 t \ln (| t |)$

Step 3.13.2

Simplify each term.

Tap for more steps...

Step 3.13.2.1

Remove non-negative terms from the absolute value.

$\frac{t^{3}}{t^{2}} + 2 t \ln (| t |)$

Step 3.13.2.2

Cancel the common factor of $t^{3}$ and $t^{2}$ .

Tap for more steps...

Step 3.13.2.2.1

Factor $t^{2}$ out of $t^{3}$ .

$\frac{t^{2} t}{t^{2}} + 2 t \ln (| t |)$

Step 3.13.2.2.2

Cancel the common factors.

Tap for more steps...

Step 3.13.2.2.2.1

Multiply by $1$ .

$\frac{t^{2} t}{t^{2} \cdot 1} + 2 t \ln (| t |)$

Step 3.13.2.2.2.2

Cancel the common factor.

$\frac{t^{2} t}{t^{2} \cdot 1} + 2 t \ln (| t |)$

Step 3.13.2.2.2.3

Rewrite the expression.

$\frac{t}{1} + 2 t \ln (| t |)$

Step 3.13.2.2.2.4

Divide $t$ by $1$ .

$t + 2 t \ln (| t |)$

Step 4

Reform the equation by setting the left side equal to the right side.

$s' = t + 2 t \ln (| t |)$

Step 5

Replace $s'$ with $\frac{d s}{d t}$ .

$\frac{d s}{d t} = t + 2 t \ln (| t |)$