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Q.

If f(x)={3(1+|tanx|)α|tanx|,12<x<0β,x=03[1+|sinx3|]2|tanx|,0<x<23 is a continuous function at x=0, then which of the following Options is/are correct ?

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a

α=32

b

β=3e23

c

α=23

d

β=2e32

answer is B, D.

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Detailed Solution

LHL=f(01)=limx03(1+|tanx|)α|tanx|,(1  form)3.e limx0|tanx||tanx|=3e

Now, RHL=f(0+)=limx0+f(x)=limx0+3[1+|sinx|3]2|tanx|,(1form)=3elimx0+|sinx2|2|tanx|=3e23

So, for the function f(x) to be continuous at x=0 we must have 

At x=0,we must have 3eα=3e23=β

so.α=23,β=3e23

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