Calculus Examples

$y = x^{9} e^{x}$

Step 1

Differentiate using the Product Rule which states that $\frac{d}{d x} [f (x) g (x)]$ is $f (x) \frac{d}{d x} [g (x)] + g (x) \frac{d}{d x} [f (x)]$ where $f (x) = x^{9}$ and $g (x) = e^{x}$ .

$x^{9} \frac{d}{d x} [e^{x}] + e^{x} \frac{d}{d x} [x^{9}]$

Step 2

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

$x^{9} e^{x} + e^{x} \frac{d}{d x} [x^{9}]$

Step 3

Differentiate using the Power Rule which states that $\frac{d}{d x} [x^{n}]$ is $n x^{n - 1}$ where $n = 9$ .

$x^{9} e^{x} + e^{x} (9 x^{8})$

Step 4

Simplify.

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Step 4.1

Reorder terms.

$e^{x} x^{9} + 9 e^{x} x^{8}$

Step 4.2

Reorder factors in $e^{x} x^{9} + 9 e^{x} x^{8}$ .

$x^{9} e^{x} + 9 x^{8} e^{x}$