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If lim (xtooo)[(x ^(3) +1)/(x ^(2)+1)-(a...

If `lim _(xtooo)[(x ^(3) +1)/(x ^(2)+1)-(ax+b) ]=2,` then the values of a and b are-

A

`a=1, b=-2`

B

`a=1, b=1`

C

`a=1, b=-1`

D

`a=1, b=2`

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The correct Answer is:
A
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