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

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Answer 1 · 2015-12-09T14:44:32

$3 x + 1 and 3 x + 3$ $3x +1 and 3x + 3$

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

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

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