Question

Given the following sequence
2, 8, 18, 32, 50 ...
what is the nth term in this sequence?

Answer 1

a. 2n
b. 2n^2
c. n + 1
d. n^2 + 1

Answer 2

let n =1,2,3,4,... see which one works

Answer 3

4?

Answer 4

4 what?

Answer 5

would n equal 4?

Answer 6

take 2n^2
let n = 1, and you get 2*1=2
let n = 2 and you get 2*2^2 = 8
let n = 3 and you get 2*3^2 = 18
let n = 4.....

Answer 7

2*4^2 = 64?

Answer 8

2*4^2 = 2*16 = 32

Answer 9

Got it.