CBSE Class 11-science Answered
is this a right one
Asked by mridulbhardwaj | 23 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
Regards
Team Topperlearning
Answered by | 23 Apr, 2010, 02:01: PM
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