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All formula of a.p

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All formula of a.p
  • 2 answers

Sweta Verma 7 years, 3 months ago

S = n/2(a+l)

Sweta Verma 7 years, 3 months ago

First one is an= a+ (n-1)d second is sn =n/2(2a+(n-1)d
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