1+3+5+7+......+n=100 find the value of n
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the value of n is 10, just use the formula given in the picture
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Step-by-step explanation:
Sn=100, Sn=n/2(2a+(n-1)d), then100=n/2 (2×1+(n-1)2),100=n/2(2+2n-2,100=n/2(2n), 100 =n×n.hence n=10. Mark it best
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