Question

g(n) = 4n+5 f(n)= n^3+3n^2 find (g+f)(n)

Answer 1

Given:

The two functions are:

$g(n)=4n+5$

$f(n)=n^3+3n^2$

To find:

The function $(f+g)(n)$.

Solution:

We have,

$g(n)=4n+5$

$f(n)=n^3+3n^2$

Now,

$(f+g)(n)=f(n)+g(n)$

$(f+g)(n)=n^3+3n^2+4n+5$

Therefore, the correct option is B.