#1
I don't want answers, I just need to know what to do.

For one equation it's:

(f o g)(2)

f(x) = 3x2 Bolded numbers are powers
g(x) = x+1

which makes it 3(x+1)2

Do I take the two from (f o g)(2) here and substitute it for x or do I expand then substitute?
#2
3((2)+1)2

Right in hurr.
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#3
Quote by drunkinkoala
I don't want answers, I just need to know what to do.

For one equation it's:

(f o g)(2)

f(x) = 3x2 Bolded numbers are powers
g(x) = x+1

which makes it 3(x+1)2

Do I take the two from (f o g)(2) here and substitute it for x or do I expand then substitute?


(f o g)(2) = f ( g(2) )

So take g(2) and then substitute that into f.
#4
Thanks, I have a couple answers though I don't know which is right, is it 12 or 27 or none of the above?
#5
g(x) = x + 1 => g(2) = 2 + 1 = 3

f(x) = 3 . x^2 => f( g(x) ) = 3 . ( g(x) )^2 = 3 . 3^2 = 3 . 9 = 27
#6
Quote by Malakian88
g(x) = x + 1 => g(2) = 2 + 1 = 3

f(x) = 3 . x^2 => f( g(x) ) = 3 . ( g(x) )^2 = 3 . 3^2 = 3 . 9 = 27

Thanks a lot and thanks to toast too.