Math, asked by gbalani404, 8 months ago

pth term of an AP is 3p-1 show that Sn=n/12(3n+1)

Answers

Answered by sprao53413

1

Answer:

T1=2

Tn=3n-1

Sn=n/2(T1+Tn)=n/2(2+3n-1)=n/2(3n+1)

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