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The sum of first n odd natural number is dash |
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Answer» That is for n natural number, for n odd natural number, the sum is n² We know that Sn=n/2[a+l] A.p-- 1,3,5,........na=1,d=3-1=2,l=nTherefore, Sn=n/2[1+n]=n^2+n/2 |
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