How would you solve a problem like this: If f(x)= 1– x^3 and g(x) = x+5, then (g+f)(2)= ?

Answer 1

This is referring to composite functions

(g + f)(x) = g(x) + f(x)

(x+5) + (1 - x^-3)

want (g + f)(2)

Plug in 2 where we see x

(2+5) + (1- 2^-3)

7 + (1- 1/8)

7 + (7/8) = 63/8

Answer 2

Add the two functions together and then let x = 2.