Question

What is the fifth term of the sequence generated by the formula below? an=n^3+n^2-9n-9

Answer 1

96 , B on edge

Explanation:

got it correct !

Answer 2

`a_(5) = 96`.

Explanation:

Given :
`a_(n) = n^(3) +n^(2) -9n -9`.

To find : What is the fifth term of the sequence .

Solution : We have given
`a_(n) = n^(3) +n^(2) -9n -9`.

For n = 5

`a_(5) = 5^(3) +5^(2) -9(5) -9`.

Open the cubes and squares

`a_(5) = 125 + 25  - 45  -9`.

Add the terms

`a_(5) = 96`..

Therefore,
`a_(5) = 96`.