1. I just need a refresher I guess. I'm getting caught up with how to balance an equation with a variable exponent.

This isn't homework, I'm studying for the CLEP exams, and am not asking for the answer, just a step by step aproach to how to solve this.

f(x)=4x^2+5
g(x)=2^x
f(g(-1))=n

Solve for n

I start by deviding both the first equations by (x) ending up with

f=4x+5
g=(2^x)/x

Can this be simplified any further? Is my math correct? How would I solve for x?  2.

3. this seems to be a composite function problem, and i am guessing you know the definition of a composite function.

i don't know why you are dividing it by x.

see your notation of f(x) symbolizes a function, therefore you cant just divide x ,unless you are referring to f as a constant.

anyhow, g(-1)=2^-1

then you substitute this value in to the x-value for the function of f. so you get;

n=4(2^-1)^2 +5  Bookmarks
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