Math, asked by prc91, 10 months ago

how many terms of the series 5 + 19/4 + 9/2 +..........will sum upto 51.

Answers

Answered by vishalbansal612

1

Answer:

Sn=n/2+(2a+(n-1)d)

51=n/2+2(5+(n-1)-1/4

102=n(5n-5)-1/4

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