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Q.

If L=Limx0sin2x+asinxx3 be finite then

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a

a=2 L=1

b

a=1 L=2

c

a=1 L=1

d

a=2 L=1

answer is A.

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Detailed Solution

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 L-Rule  Limx02cos2x+acosx3x22cos 0+acos0=02+a=0a=2 as denominator 0 numerator 0 as x0 L=Limx02cos2x-2cosx3x2=Limx0-4sin2x+2sinx6x =-43+13=-1 

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