Question

describe the pattern used in sequences of 2,6,12,20

Answer 1

plus two 2's, three 2's, four 2's etc

Answer 2

\(6 - 2 = 4\)
\(12 - 6 = 6\)
This is a sequence with difference between \(T_n ,T_{n + 1}\) terms given by \(2 + 2n\)

Answer 3

n^2 + n

Answer 4

2^2+2. 3^2+3, 4^2+4 etc

Answer 5

Yep. That's the formula.