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Q.

If the function fx= k1x-π2-1,xπk2cosx,x>π , is twice differentiable, then the ordered pair (k1,k2) is 
 

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a

(1/2,1)

b

(1,0)

c

(1/2,-1)

d

(1,1)

answer is A.

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Detailed Solution

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Differentiable  continuous    k2=1
  f1(x)=2k1(xπ),x<πLHD=RHD                               
                                                       
=k2sinx,x>πk1=1/2

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