If f(x) = x 2 + 1 and g(x) = 3x + 1, find 2f(1) + 3g(4)

Answer 1

Well f(1) = (1)² + 1, which would give you 2. So f(1) = 2 (*input of 1 gives you an output of 2).

g(4) = 3(4) + 1 = 13. So g(4) = 13 (*input of 4 gives you an output of 13).

So 2f(1) + 3g(4) = 2(2) + 3(13) or 43.

I hope this helps!

Answer 2

I assume you meant to say

f(x) = x² + 1, not x2 + 1

2f(1) + 3g(4) = 2[(1)² + 1] + 3[3(4) + 1] = ?

You should be able to finish from here.