A.M . of the series 1, 3, 9, 27, dots, 3n is

Question

A.M . of the series 1, 3, 9, 27, dots, 3n is (A) (3n-1/n) (B) (3n+1+1/n+1) (C) (3n+1-1/2 (n+1)) (D) (3n+1/n+1)

Tardigrade Admin · Accepted Answer

A.M. =(1+3+9+27+ ldots+3n/n+1) =(1(3n+1-1)/(3-1)(n+1)) (As number of items are n + 1) =(3n+1-1/2(n+1))

Q. $A . M$ . of the series $1, 3, 9, 27, \dots, 3^{n}$ is