Precalculus Help - Find f of g & g of f (x)

[unknownuser]

HELP! Precalculus

I just started my precalculus class and i can not understand what's going on and its makes me mad too. In our book we are on 1-2 Composition and Inverses of Functions like for this one problem:

Find [f of g] (x) and [g of f] (x).
1. f(x)= 1/2x-7
g(x)= x=6

please help because I don't understand...

 

[AKG]

What do you mean by "g(x)= x=6"? And which of the following do you mean?

f(x) = \frac{1}{2x} - 7

f(x) = \frac{1}{2x-7}

f(x) = \frac{1}{2}x - 7

 

[AKG]

And in the future, please place threads like this in the "Precalculus Mathematics" forum of the "Homework & Coursework Questions" section.