Find f(g(x)) f(x)=4x and g(x)=x/4

$f (x) = 4 x$ and $g (x) = \frac{x}{4}$

Set up the composite result function.

$f (g (x))$

Evaluate $f (\frac{x}{4})$ by substituting in the value of $g$ into $f$ .

$f (\frac{x}{4}) = 4 (\frac{x}{4})$

Cancel the common factor of $4$ .

Cancel the common factor.

$f (\frac{x}{4}) = 4 (\frac{x}{4})$

Rewrite the expression.

$f (\frac{x}{4}) = x$