Question

First four terms of the sequence an= n2-1

Answer 1

Step-by-step explanation:

1st term = 2× 1 -1

= 2-1 = 1

T2 = 2×2 -1

= 4-1 = 3

T3 = 2×3 -1

= 6-1 = 5

T4 = 2×4 -1 = 8-1 = 7