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Find the arithmetic Series whose sum of n terms is give by n(n+2) |
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Answer» sum of n terms=n(n+2)=n/2(2a+(n-1)d)now sum of 1 term=1/2(2a)=3 so a=3and sum of two terms=2(4)=8=2/2(6+d)6+d=8 so d=2so series is 3,5,7,9,... |
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