Thread: Tricky question

Morning Forum I am having issues with the following question any help would be appreciated:

Originally Posted by AlgebraicallyChallenged

Morning Forum I am having issues with the following question any help would be appreciated:

It might help if you write

as

and

as .

Can you see what's happening now?

I can't remember how is that sign called between the f and g..


compo.. something?

Originally Posted by metlx

I can't remember how is that sign called between the f and g..


compo.. something?

Yes it's a composition of functions.

Let me put it this way.

Say you had a function .

If you evaluated it at say, point you would have to replace all the x's with a's.

Here, if we had , instead of substituting x with a, we'd see what happens if we replaced all the x's with whatever is.

Does that make sense?