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The sum to infinity of the series 1+2(...

The sum to infinity of the series
`1+2(1-(1)/(n))+3(1-(1)/(n))^(2)+ . . .. . . .`, is (A)`n^(2)` (B)`n(n+1)` (C)`n(1+(1)/(n))^(2)` (D)None of these

A

`n^2`

B

n(n+1)

C

`n(1+1/n)^2`

D

None of these

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VMC MODULES ENGLISH-SEQUENCE AND SERIES -LEVEL-1
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  19. If cos(x-y), cosx and cos(x+y) are in H.P., then |cos x sec (y)/(2)| e...

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