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All formulas of AP

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All formulas of AP
  • 2 answers

Mohd Saqlain Mohd Saqlain 1 year, 1 month ago

an=l-(n-1)d and sn=n(n+1)/2, sn=n/2(a+l) sn=n/2 (2a+(n-1)d)

Mohd Saqlain Mohd Saqlain 1 year, 1 month ago

an=a+(n-1)d
http://mycbseguide.com/examin8/

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