Question

If f(x) = x² + 1 and g(x) = 3x + 1, find 2f(1) + 3g(4).

Answer 1

just substitute the values!!

Answer 2

when you have something like "f(1)", just rewrite the expression using 1 instead of x

Answer 3

f(1)=1^1+1

Answer 4

g(4)=3(4)+1

Answer 5

now cant you do the rest ?

Answer 6

Subtitute the value to the equation:
f (1) = 1^2 + 1 = 1+1=2
g(4) = 3.4 + 1 = 12 + 1 = 13
So,
2f(1) + 3f(4) = 2.2 + 3.13 = ??? (I'm sure you can finish the rest ~_^ )