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Find the values of a and b in order that...

Find the values of a and b in order that
`underset(xto0)lim(x(1+acosx)-bsinx)/(x^(3))=1.`

A

`a=-5//2,b=-1//2`

B

`a=-3//2, b=-1//2`

C

`a=-3//2, b=-5//2`

D

`a=-5//2,b=-3//2`

Text Solution

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The correct Answer is:
D
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