SOLUTION: Find (g o f)(3) if g(x) = 3x and f(x) = x - 3 Need help solving, I see the formula, but don't get it. (g o f)(3) = g(f(3)). We need to find f(3) first. f(x) = x - 3 f

Algebra ->  Expressions-with-variables -> SOLUTION: Find (g o f)(3) if g(x) = 3x and f(x) = x - 3 Need help solving, I see the formula, but don't get it. (g o f)(3) = g(f(3)). We need to find f(3) first. f(x) = x - 3 f      Log On


   



Question 544555: Find (g o f)(3) if g(x) = 3x and f(x) = x - 3
Need help solving, I see the formula, but don't get it.
(g o f)(3) = g(f(3)).
We need to find f(3) first.
f(x) = x - 3
f(3) = 3 - 3
f(3) = 0
We now know that f(3) = 0.
g(f(3)) = 3x
g(f(3)) = 3(0)
g(f(3)) = 0

So, (g o f)(3) = 0.



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