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July 14th, 2019, 12:55 AM   #1
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Math Focus: Algebra.
f(f(g)) problem

Hello everybody, I am a noob in this forum. I have a problem combining two functions.
f(x) is: - (5cos(pi*x))/(2) - 6.
g(x) is: -(3x/2).
For f(g(x)) I have gotten the following result:
(15cos(pi*x))/(4) - 6, but I don’t know whether that is correct.
Can anyone here help?

Last edited by skipjack; July 14th, 2019 at 02:21 AM.
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July 14th, 2019, 02:24 AM   #2
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It's incorrect.

f(g(x)) = - (5cos(pi*g(x)))/(2) - 6

Now replace g(x) in the right-hand side with -(3x/2).
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July 14th, 2019, 09:41 PM   #3
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Thanks

Thanks for your kind reply!
//Ulf
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