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If lim (xto oo) (sqrt( x ^(2) -x+1)-ax ...

If `lim _(xto oo) (sqrt( x ^(2) -x+1)-ax -b)=0,` then for `k ge 2, (k in N ) lim _(xto oo) sec ^(2n) (k !" "pi b ) =`

A

`a`

B

`-a`

C

`2a`

D

`b`

Text Solution

Verified by Experts

The correct Answer is:
A
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