Question

Generalize the pattern by finding the nth term. 2, 6, 12, 20...

Answer 1

this is neither a geometric nor an arithmetic sequence

add 4, add 6, add 8

Since you have options, I would guess and check

n=2                      

2^2+2 =6        

3(2)-1 = 5  no

(2+1) (2+2) =12  no

Choice A