0,1,2,4,6,9,12,16,20,25,30,36,42,49,56,64,72,81,90?
How to calculate nth term of this series can anyone help with explanation?
0,1,2,4,6,9,12,16,20,25,30,36,42,49,56,64,72,81,90?
How to calculate nth term of this series can anyone help with explanation?
If you carefully observe the difference between adjacent elements forms a series and that looks like
0,1,1,2,2,3,3,4,4,5,5,6,6,7,7,…
nth in the initial series is equal to the sum of first n terms in the above series and that can be done easily. If you still have any doubt please do comment and here is the link to my solution.
if n is even then nth term=(n/2)^2
if n is odd then nth term=(n-1)/2 * (n+1)/2