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Functions f , g : R → R are defined, respectively, by f (x) = x2 + 3x + 1, g (x) = 2x – 3,
find f o f

Pawan Prajapati , 5 Years ago
Grade 12
anser 1 Answers
Harshit Singh
Dear Student

Given that,
f(x)=x^2+3x+1,
g(x)=2x–3

fof = f(f(x))

=f(x^2+3x+1)
=(x^2+3x+1)^2+3(x^2+3x+1)+1
=x^4+ 9x^2+ 1+ 6x^3+ 6x + 2x^2+ 3x^2+ 9x + 3 + 1
=x^4+ 6x^3+14x^2+15x + 5


Thanks
Last Activity: 5 Years ago
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