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If underset(x to 0)"Lt" (x(1+a cos x)-b...

If `underset(x to 0)"Lt" (x(1+a cos x)-b sin x)/(x^(3))=1" then "(a,b)=`

A

(0,3/2)

B

(1,2/3)

C

(5/2,-2/3)

D

(-5/2,-3/2)

Text Solution

Verified by Experts

The correct Answer is:
D
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