Question

2.
If f(x) = 2x+4, then what is the value
of ƒ(4) + f(6) ?

Answer 1

f(x) = 2x + 4; f(4) + f(6)

= (2(4)+4) + (2(6)+4)

= 12 + 18

= 28

Step-by-step explanation:

You are given the function, f(x)= 2x+4, and the x-values, x=4 and x=6, to input into the function. You then add together the values solved for from each function making your final answer 28.

HOWEVER, if the f (4) represents the derivative of f(x) where x=4 follow these steps:

f(x) = 2x + 4; f (x) = 2; f (4) + f(6)

These are the functions you have, including the derivative of f(x). You then plug in your numbers:

= (2) + (2(6) + 4)

= 2 + 18

= 20