How do you compute (fog) and (gof) if $g(x) = 3x$ , $f(x) = x +1$ ?

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Answer 1 · 2015-12-09T14:44:32

$3x +1 and 3x + 3$

$f(g(x)) = f(3x) = (3x) + 1$

$g(f(x)) =g(x+1) = 3(x+1)$

How do you compute (fog) and (gof) if g(x) = 3xg(x) = 3x, f(x) = x +1f(x) = x +1?