Question

If f(x) = 1/2 x + 2 and g(x) = −3x − 1, find g[f(4)].

−19

11

−13

−11

Answer 1

If you're given something like g[f(x)], that means that you want to find f(x), and take that value, and plug into to g. For example:

g[f(0)]:
Since \(\displaystyle f(0)=\frac{1}{2}(0)+2=2 \) \( g[f(0)]=g(2)=-3(2)-1=-7\).

Now can you do this with 4 instead of 0?

Answer 2

so iht would be -11

Answer 3

You're very close. You have f(4)=4 correct?

Answer 4

i got it -13

Answer 5

Bingo.

Answer 6

thanx

Answer 7

you're welcome.

Answer 8

can yhu help with one other question to?