Precalculus Examples

$f (x) = x + 1$ , $g (x) = x^{2}$ , $g (f (x))$

Step 1

Set up the composite result function.

$g (f (x))$

Step 2

Evaluate $g (x + 1)$ by substituting in the value of $f$ into $g$ .

$g (x + 1) = {(x + 1)}^{2}$

Step 3

The domain of the expression is all real numbers except where the expression is undefined. In this case, there is no real number that makes the expression undefined.

Interval Notation:

$(- \infty, \infty)$

Set-Builder Notation:

${x | x \in ℝ}$

Step 4

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