Calculus Examples

$f (x) = 7 x^{2} - 3 e^{x}$

Step 1

By the Sum Rule, the derivative of $7 x^{2} - 3 e^{x}$ with respect to $x$ is $\frac{d}{d x} [7 x^{2}] + \frac{d}{d x} [- 3 e^{x}]$ .

$\frac{d}{d x} [7 x^{2}] + \frac{d}{d x} [- 3 e^{x}]$

Step 2

Evaluate $\frac{d}{d x} [7 x^{2}]$ .

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Step 2.1

Since $7$ is constant with respect to $x$ , the derivative of $7 x^{2}$ with respect to $x$ is $7 \frac{d}{d x} [x^{2}]$ .

$7 \frac{d}{d x} [x^{2}] + \frac{d}{d x} [- 3 e^{x}]$

Step 2.2

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

$7 (2 x) + \frac{d}{d x} [- 3 e^{x}]$

Step 2.3

Multiply $2$ by $7$ .

$14 x + \frac{d}{d x} [- 3 e^{x}]$

Step 3

Evaluate $\frac{d}{d x} [- 3 e^{x}]$ .

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Step 3.1

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

$14 x - 3 \frac{d}{d x} [e^{x}]$

Step 3.2

Differentiate using the Exponential Rule which states that $\frac{d}{d x} [a^{x}]$ is $a^{x} \ln (a)$ where $a$ = $e$ .

$14 x - 3 e^{x}$