Calculus Examples

$y = \log (5) {(3 x^{2} - 2 x)}^{\frac{5}{2}}$

Step 1

Since $\log (5)$ is constant with respect to $x$ , the derivative of $\log (5) {(3 x^{2} - 2 x)}^{\frac{5}{2}}$ with respect to $x$ is $\log (5) \frac{d}{d x} [{(3 x^{2} - 2 x)}^{\frac{5}{2}}]$ .

$\log (5) \frac{d}{d x} [{(3 x^{2} - 2 x)}^{\frac{5}{2}}]$

Step 2

Differentiate using the chain rule, which states that $\frac{d}{d x} [f (g (x))]$ is $f' (g (x)) g' (x)$ where $f (x) = x^{\frac{5}{2}}$ and $g (x) = 3 x^{2} - 2 x$ .

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Step 2.1

To apply the Chain Rule, set $u$ as $3 x^{2} - 2 x$ .

$\log (5) (\frac{d}{d u} [u^{\frac{5}{2}}] \frac{d}{d x} [3 x^{2} - 2 x])$

Step 2.2

Differentiate using the Power Rule which states that $\frac{d}{d u} [u^{n}]$ is $n u^{n - 1}$ where $n = \frac{5}{2}$ .

$\log (5) (\frac{5}{2} u^{\frac{5}{2} - 1} \frac{d}{d x} [3 x^{2} - 2 x])$

Step 2.3

Replace all occurrences of $u$ with $3 x^{2} - 2 x$ .

$\log (5) (\frac{5}{2} {(3 x^{2} - 2 x)}^{\frac{5}{2} - 1} \frac{d}{d x} [3 x^{2} - 2 x])$

Step 3

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

$\log (5) (\frac{5}{2} {(3 x^{2} - 2 x)}^{\frac{5}{2} - 1 \cdot \frac{2}{2}} \frac{d}{d x} [3 x^{2} - 2 x])$

Step 4

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

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

Step 5

Combine the numerators over the common denominator.

$\log (5) (\frac{5}{2} {(3 x^{2} - 2 x)}^{\frac{5 - 1 \cdot 2}{2}} \frac{d}{d x} [3 x^{2} - 2 x])$

Step 6

Simplify the numerator.

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Step 6.1

Multiply $- 1$ by $2$ .

$\log (5) (\frac{5}{2} {(3 x^{2} - 2 x)}^{\frac{5 - 2}{2}} \frac{d}{d x} [3 x^{2} - 2 x])$

Step 6.2

Subtract $2$ from $5$ .

$\log (5) (\frac{5}{2} {(3 x^{2} - 2 x)}^{\frac{3}{2}} \frac{d}{d x} [3 x^{2} - 2 x])$

Step 7

Combine fractions.

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Step 7.1

Combine $\frac{5}{2}$ and ${(3 x^{2} - 2 x)}^{\frac{3}{2}}$ .

$\log (5) (\frac{5 {(3 x^{2} - 2 x)}^{\frac{3}{2}}}{2} \frac{d}{d x} [3 x^{2} - 2 x])$

Step 7.2

Combine $\frac{5 {(3 x^{2} - 2 x)}^{\frac{3}{2}}}{2}$ and $\log (5)$ .

$\frac{5 {(3 x^{2} - 2 x)}^{\frac{3}{2}} \log (5)}{2} \frac{d}{d x} [3 x^{2} - 2 x]$

Step 8

By the Sum Rule, the derivative of $3 x^{2} - 2 x$ with respect to $x$ is $\frac{d}{d x} [3 x^{2}] + \frac{d}{d x} [- 2 x]$ .

$\frac{5 {(3 x^{2} - 2 x)}^{\frac{3}{2}} \log (5)}{2} (\frac{d}{d x} [3 x^{2}] + \frac{d}{d x} [- 2 x])$

Step 9

Since $3$ is constant with respect to $x$ , the derivative of $3 x^{2}$ with respect to $x$ is $3 \frac{d}{d x} [x^{2}]$ .

$\frac{5 {(3 x^{2} - 2 x)}^{\frac{3}{2}} \log (5)}{2} (3 \frac{d}{d x} [x^{2}] + \frac{d}{d x} [- 2 x])$

Step 10

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

$\frac{5 {(3 x^{2} - 2 x)}^{\frac{3}{2}} \log (5)}{2} (3 (2 x) + \frac{d}{d x} [- 2 x])$

Step 11

Multiply $2$ by $3$ .

$\frac{5 {(3 x^{2} - 2 x)}^{\frac{3}{2}} \log (5)}{2} (6 x + \frac{d}{d x} [- 2 x])$

Step 12

Since $- 2$ is constant with respect to $x$ , the derivative of $- 2 x$ with respect to $x$ is $- 2 \frac{d}{d x} [x]$ .

$\frac{5 {(3 x^{2} - 2 x)}^{\frac{3}{2}} \log (5)}{2} (6 x - 2 \frac{d}{d x} [x])$

Step 13

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

$\frac{5 {(3 x^{2} - 2 x)}^{\frac{3}{2}} \log (5)}{2} (6 x - 2 \cdot 1)$

Step 14

Simplify the expression.

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Step 14.1

Multiply $- 2$ by $1$ .

$\frac{5 {(3 x^{2} - 2 x)}^{\frac{3}{2}} \log (5)}{2} (6 x - 2)$

Step 14.2

Reorder the factors of $\frac{5 {(3 x^{2} - 2 x)}^{\frac{3}{2}} \log (5)}{2} (6 x - 2)$ .

$(6 x - 2) \frac{5 {(3 x^{2} - 2 x)}^{\frac{3}{2}} \log (5)}{2}$