in an AP if Sn=4n-n2 then d is – InterviewSolution

1.

in an AP if Sn=4n-n2 then d is

Answer»

Sn=4n-n²a₁=S₁=4-1=3S₂=a₁+a₂4*2-(2)²=3+a₂4=3+a₂a₂=1

d=a₂-a₁d=1-3=-2

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