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Find the sum of the series …

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Find the sum of the series up to N terms 1*3*7+2*6*11+3*9*15+...........
  • 2 answers

Vasu Deekshith 8 years, 2 months ago

a=1d=2 TN =1+(n-1)2 =1+2n-2 =2n-1

Vasu Deekshith 8 years, 2 months ago

Tn=a+(n-1)d
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