SOLUTION: I am not understanding the (f o f) problems this one for sure
f(x)=3x and g(x)=9x^2+1
with (f o f)(1)
Thank you
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-> SOLUTION: I am not understanding the (f o f) problems this one for sure
f(x)=3x and g(x)=9x^2+1
with (f o f)(1)
Thank you
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Question 1015736: I am not understanding the (f o f) problems this one for sure
f(x)=3x and g(x)=9x^2+1
with (f o f)(1)
Thank you Found 2 solutions by fractalier, ikleyn:Answer by fractalier(6550) (Show Source):
You can put this solution on YOUR website! .
I am not understanding the (f o g) problems this one for sure
f(x)=3x and g(x)=9x^2+1
with (f o f)(1)
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Hello,
to find (fog)(x), you need to substitute the expression for g(x) into f(x) instead of x,
and after that to make all necessary calculations / transformations.
It is the general rule, and below I show you how it works in your case.
Your function f(x) = 3*x simply multiplies x by 3.
Now, substitute g(x) into f instead of x. You will get
(fog)(x) = f( (g(x) ) = 3*g(x) = = .
That is all. You just found (f0g)(x). It is (fog)(x) = .
Now, when they ask you about (fog)(1), simply substitute x=1 into
(fog)(x) = .
You will get (fog)(x) = = 27 + 3 = 30.
It is your answer.
One more notice. What I wrote above, relates to (fog)(x) and (fog)(1).
It is not about (fof)(x) and not about (fof)(1).
Next time formulate your question more clearly please.
Here you mixed two questions: about (fog)(x) and about (fof)(x).
