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saahil 4Aug2008 23:12

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

asadullah.ansari 9Feb2009 14:11

Re: sum of following series
 
Use 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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