Hi, have completed a whole worksheet but the challenge involves finding the first five terms from the following terms:

Question

a) 3n^2 - 2
b) 2n^2 - 4

I have no idea how to go about this so any guidance would be greatly appreciated! Thanks

Answer 1

just plug in values for n, from 1 to 5.
Tn is the nth term.

So, for the first one,

T1 = 3(1^2)-2 = 3*1-2 = 3-2 = 1
T2 = 3(2^2)-2 = 3*4-2 = 12-2 = 10
and so on

Answer 2

Would the second be -2, 4, 14, 18 and 46? Thanks