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I have a question need help

Why can't we use sum of 1-301 minus sum of 1-99, then we will get 301*302/2-99*100/2=40501, why it is wrong?

by jonathanjing

Sun Sep 16, 2012 9:31 pm
Forum: Problem Solving
Topic: For any positive integer n, the sum of
Replies: 7
Views: 4060