limits problem

Posted by rongmon on Apr 22, 2014; 3:31am
URL: http://discussion-forum.276.s1.nabble.com/limits-problem-tp7587565.html

The limiting value of [1.2 + 2.3 + 3.4 + .... n(n+1)]/n^3 as n tends to infinity is

a. 0
b. 1
c. 1/3
d. 1/2

thanks