Question

What are the first four terms in the nth term n(2n + 1)

Answer 1

Answer:

0

3

10

21

36

Explination:

0 x anything is still zero, but I don't know if that counts.

1 (2+1) = 3

2 (4+1) = 10

3 (6+1) = 21

4 (8+1) = 36