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sum of following seriesenter x &n and display sum of following series
x1 +x2 +x3+- - - - - - - -+xn(1,2,3,-----,n are powers of x) |

Re: sum of following seriesUse this formula...
sum = a |(r^(n-1) -1 )| /|(r-1)| where a = first term r = second term/ first term ( Tn/T(n-1) ) |

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