Find f(g(x)) f(x)=9x and g(x)=x/9

$f (x) = 9 x$ and $g (x) = \frac{x}{9}$

Set up the composite result function.

$f (g (x))$

Evaluate $f (\frac{x}{9})$ by substituting in the value of $g$ into $f$ .

$f (\frac{x}{9}) = 9 (\frac{x}{9})$

Cancel the common factor of $9$ .

Cancel the common factor.

$f (\frac{x}{9}) = 9 (\frac{x}{9})$

Rewrite the expression.

$f (\frac{x}{9}) = x$