Thursday, June 16, 2011

Summer Problem Solving Marathon Question #15

[Value = 6 points]

What integer is closest to the value of 1000 times the sum of the expression 1n2-4 evaluated for every integer value of n from n=3 to n = 10000 inclusive.

(That is, what is the closest integer to 1000(132-4 + 142-4 + ... + 1100002-4)?)