Find the value (f o f)(3)

Mathematics
Tutor: None Selected Time limit: 1 Day

Let f(x) = 2x^2-1 and g(x) = 2x+1. Find the value (f o f)(3)

A. 289

B. 557

C. 97

D. 35

Oct 26th, 2015

Thank you for the opportunity to help you with your question!

(f o f)(3)

=f(f(3))=f(2*3^2-1)=f(17)

f(17)=2*17^2-1=577

Did you write B wrong because the answer is 577 not 557?


Please let me know if you need any clarification. I'm always happy to answer your questions.
Oct 26th, 2015

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