math destroyer help!

[RING12]

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on second exam q#15

if G(F(x))=x2-3 and G(X)=x-3 find f(3).

I know it's an easy problem but for some reason cant figure, how I used to solve the problem, if some one can show me I should do it I really appreciated!

 

[silveryhair]

Look for the whizkid math destroyer post. It has the solutions for that question.

 

[rnbaxter]

on second exam q#15

if G(F(x))=x2-3 and G(X)=x-3 find f(3).

I know it's an easy problem but for some reason cant figure, how I used to solve the problem, if some one can show me I should do it I really appreciated!

If Gx=x-3 then you have to substute Fx into Gx to get x2-3. Therefore you see you substuted x2 for x. That means Fx is x2.

So F(3) is 3^2 is 9

 

[RING12]

I cant find it, if you dont mind can you post the link that I can look at the solution!

 

[RING12]

your explanation is the same as destroyer, I dont get it, can you just write what do you?

 

[silveryhair]

http://forums.studentdoctor.net/showthread.php?t=741558

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