Calculus Examples

$- \frac{y}{x - 1}$

Step 1

Differentiate using the Constant Multiple Rule.

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Step 1.1

Since $- y$ is constant with respect to $x$ , the derivative of $- \frac{y}{x - 1}$ with respect to $x$ is $- y \frac{d}{d x} [\frac{1}{x - 1}]$ .

$- y \frac{d}{d x} [\frac{1}{x - 1}]$

Step 1.2

Rewrite $\frac{1}{x - 1}$ as ${(x - 1)}^{- 1}$ .

$- y \frac{d}{d x} [{(x - 1)}^{- 1}]$

Step 2

Differentiate using the chain rule, which states that $\frac{d}{d x} [f (g (x))]$ is $f' (g (x)) g' (x)$ where $f (x) = x^{- 1}$ and $g (x) = x - 1$ .

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Step 2.1

To apply the Chain Rule, set $u$ as $x - 1$ .

$- y (\frac{d}{d u} [u^{- 1}] \frac{d}{d x} [x - 1])$

Step 2.2

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

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

Step 2.3

Replace all occurrences of $u$ with $x - 1$ .

$- y (- {(x - 1)}^{- 2} \frac{d}{d x} [x - 1])$

Step 3

Differentiate.

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Step 3.1

Multiply $- 1$ by $- 1$ .

$1 y ({(x - 1)}^{- 2} \frac{d}{d x} [x - 1])$

Step 3.2

Multiply $y$ by $1$ .

$y ({(x - 1)}^{- 2} \frac{d}{d x} [x - 1])$

Step 3.3

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

$y {(x - 1)}^{- 2} (\frac{d}{d x} [x] + \frac{d}{d x} [- 1])$

Step 3.4

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

$y {(x - 1)}^{- 2} (1 + \frac{d}{d x} [- 1])$

Step 3.5

Since $- 1$ is constant with respect to $x$ , the derivative of $- 1$ with respect to $x$ is $0$ .

$y {(x - 1)}^{- 2} (1 + 0)$

Step 3.6

Simplify the expression.

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Step 3.6.1

Add $1$ and $0$ .

$y {(x - 1)}^{- 2} \cdot 1$

Step 3.6.2

Multiply $y$ by $1$ .

$y {(x - 1)}^{- 2}$

Step 4

Simplify.

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Step 4.1

Rewrite the expression using the negative exponent rule $b^{- n} = \frac{1}{b^{n}}$ .

$y \frac{1}{{(x - 1)}^{2}}$

Step 4.2

Combine $y$ and $\frac{1}{{(x - 1)}^{2}}$ .

$\frac{y}{{(x - 1)}^{2}}$