Find the Domain of the Composition f(g(x)) f(x)=2x g(x)=x+5

$f (x) = 2 x$ $g (x) = x + 5$

Set up the composite result function.

$f (g (x))$

Evaluate $f (x + 5)$ by substituting in the value of $g$ into $f$ .

$f (x + 5) = 2 (x + 5)$

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:

${x | x \in ℝ}$

Find the Domain of the Composition f(g(x)) f(x)=2x g(x)=x+5

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