is this a right one

Asked by mridulbhardwaj | 23rd Apr, 2010, 01:16: PM

Expert Answer:

Dear Student

Sum of first n natural numbers is 1+2+3+..........+n = [(n(n+1)]/2

using n = n-2 we have
1+2+3+..........+(n-2) = [(n-2) (n-1)]/2

So your statement is correct

Team Topperlearning

Answered by  | 23rd Apr, 2010, 02:01: PM

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