Question

Sum to n terms of 1.2 + 2.3 + 3.4 + …………….. is

A) \(\cfrac{n(n-1)(n+2)}3\)

B) \(\cfrac{n(n+1)(n+2)}3\)

C) \(\cfrac{n(n+1)(n+2)}2\)

D) \(\cfrac{n(n-1)(n+2)}6\)

Answer 1

Correct option is B) \(\cfrac{n(n+1)(n+2)}3\)