how to know the sum of first n positive integers
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Answered by
5
the formula for that is
Sn=n/2[2a+(n-1)d]
thanks
Sn=n/2[2a+(n-1)d]
thanks
smishra01:
just go and look in ncert book
Answered by
4
By using formula, we have
Sn= n(n+1) /2
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