SOLUTION: I don't understand the o thing. Does it mean multiply or what? and I don't totally understand the function within a function. Please help me solve this. Express the function f(g

Question 380273: I don't understand the o thing. Does it mean multiply or what? and I don't totally understand the function within a function. Please help me solve this.
Express the function f(g(x))={1}/{x + 8} in the form f o g. If g(x)=x+8, find the function f(x).
Your answer is f(x)=___
Answer by Fombitz(32388) (Show Source): You can put this solution on YOUR website!
That means that wherever you have an in the function substitute .

where

Substituting,

So if you work backwards and substitute for every occurence of then,

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