Question

F(n) = n^3– 2n
g(n)= 2n + 2
Find (f •g)(n)

Answer 1

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Explanation:

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Answer 2

`\boxed{(f~.~g)(x) = 2n^4 + 2n^3 - 4n^2 -4n}`

.

Explanation:

We know that

`f(n) = n^3 - 2n`

`g(n) = 2n + 2`

.

So

`(f~.~g)(x) = f(n)~.~g(n)`

`(f~.~g)(x) = (n^3-2n)(2n + 2)`

`(f~.~g)(x) = n^3(2n + 2) - 2n(2n + 2)`

`(f~.~g)(x) = 2n^4 + 2n^3 - 4n^2 -4n`