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16-09-2016
Mathematics

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I know the answer is 12, but why?

If f(7) = 12 and g(2) = 7, then what is the value of ?

A. 2
B. 7
C. 84
D. 12

I know the answer is 12 but why If f7 12 and g2 7 then what is the value of A 2 B 7 C 84 D 12 class=

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apologiabiology apologiabiology

17-09-2016

(fog)(2)=f(g(2))

so first evaluate g(2)
we know that g(2)=7
then now we evaluate f(7)
answer is 12

see
f(g(2))=f(7)=12

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