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Q.

If limx0sin 2x+a.sin xx3 is finite, then a=

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a

2

b

-2

c

-1/2

d

1/2

answer is B.

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Detailed Solution

Ltx0sin 2x+a.sin xx3 =Ltx02 sinx cosx+a sin xx3 =Ltx0sin xx(2 cosx+a)x2 Dr0, Nr also 0 2+a=0a=-2

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