You can
put this solution on YOUR website!gf(x) only means put the value of x into the function f(x), to get an answer, then put that into the function g(x), like so:
f(x) =
--> i assume this is a cube? I am not 100% sure though from your notation.
g(x) = x + 3
so, gf(x) is
which becomes
ie
so gf(2) =
gf(2) = 8+7
gf(2) = 15
Now, strictly, we didn't need to find gf(x) first...i just did that to show you the process. If you just need to find the numerical value, then do the following:
as f(x) =
f(2) =
f(2) = 8+4
f(2) = 12
so then g(12) -- since f(2) is equivalent to 12 -- is 12+3
g(12) = 15.... same answer :-)
Hope this helps
jon
