some of first n odd natural no. is what
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they are 1 + 3 + 5+ 7+......+ except
Answered by
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Sn = n/2(2a+(n-1)d)
n/2(2+2n-2)
= n/2(0+2n)
= n/2(2n)
= n(n)
= n^2
Hope this helps!
n/2(2+2n-2)
= n/2(0+2n)
= n/2(2n)
= n(n)
= n^2
Hope this helps!
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