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If lim(xrarrinfty)(sqrt(x^2-x+1 )-ax-b) ...

If `lim_(xrarrinfty)(sqrt(x^2-x+1 )-ax-b) = 0` then the values of a and b are given by

A

a = -1, `b = frac(1)(2)

B

a = 1,` b = frac(1)(2)`

C

a = 1 b = -frac(1)(2)

D

none of these

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A
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