Question

1 1 1 For all n 2 1, the value of is: + + - 1.2 2.3 3.4 10. n(n +1) (A) n (B) n+ (C (D) None of these n +1 n(n +1)

Answer 1

Answer:

1.2+2.3+3.4+...+n(n+1) = please write options properly