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common term an= nsquare-1(n is odd number)an=nsquare+1 divided by 2 (n is even number ) find  the  sum of first six terms of this series
 

Asked by cpanchaxarichikkavali 16th March 2016, 7:18 PM
Answered by Expert
Answer:
begin mathsize 12px style straight a subscript 1 equals 1 squared minus 1 equals 0
straight a subscript 2 equals fraction numerator 2 squared plus 1 over denominator 2 end fraction equals 5 over 2
straight a subscript 3 equals 3 squared minus 1 equals 8
straight a subscript 4 equals fraction numerator 4 squared plus 1 over denominator 2 end fraction equals 17 over 2
straight a subscript 5 equals 5 squared minus 1 equals 24
straight a subscript 6 equals fraction numerator 6 squared plus 1 over denominator 2 end fraction equals 37 over 2
Sum equals 0 plus 5 over 2 plus 8 plus 17 over 2 plus 24 plus 37 over 2 equals 123 over 2 end style
Answered by Expert 17th March 2016, 2:17 PM
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