Precalculus Examples

$f (x) = \sqrt{x}$ , $g (x) = x - 4$ , $((f \circ g)) (x)$

Step 1

Set up the composite result function.

$f (g (x))$

Step 2

Evaluate $f (x - 4)$ by substituting in the value of $g$ into $f$ .

$f (x - 4) = \sqrt{x - 4}$

Step 3

Remove parentheses.

$f (x - 4) = \sqrt{x - 4}$