Looks difficult but is simple

Algebra Level 3

Let S n = ∑ k = 1 4 n ( − 1 ) k ( k + 1 ) 2 k 2 \large\displaystyle S_n = \sum_{k=1}^{4n} (-1)^{\frac{k(k+1)}2} k^2 , then which of the following is a possible value of S n S_n ?

1066 1038 1056

Hrithik Mehdiratta by Hrithik Mehdiratta , 21, India

This section requires Javascript.
You are seeing this because something didn't load right. We suggest you, (a) try refreshing the page, (b) enabling javascript if it is disabled on your browser and, finally, (c) loading the non-javascript version of this page . We're sorry about the hassle.

1 solution

0 Helpful 0 Interesting 0 Brilliant 0 Confused

0 pending reports

×

Problem Loading...

Note Loading...

Set Loading...