Algebra Examples

$\sqrt{7} x$

Step 1

Write $\sqrt{7} x$ as a function.

$f (x) = \sqrt{7} x$

Step 2

Find $f (- x)$ by substituting $- x$ for all occurrence of $x$ in $f (x)$ .

$f (- x) = \sqrt{7} (- x)$

Step 3

A function is even if $f (- x) = f (x)$ .

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Step 3.1

Check if $f (- x) = f (x)$ .

Step 3.2

Since $\sqrt{7} x = \sqrt{7} x$ , the function is even.

The function is even

Step 4