Question

Sn=3n-2.Find the 1st,3rd and 5th term

Answer 1

just plug in
n = 1, n = 3, n = 5

If will do the n = 3

S(n) = 3(3) - 2 = 7

Answer 2

1st term:

n = 1

Sn = 3 n - 2

S1 = 3 * 1 - 2 = 3 - 2 = 1


3rd term:

n = 3

Sn = 3 n - 2

S3 = 3 * 3 - 2 = 9 - 2 = 7


5th term:

n = 5

Sn = 3 n - 2

S5 = 3 * 5 - 2 = 15 - 2 = 13