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Q.

If ⨍ x=ax+b,ifx1ax2+cif1<x2dx2+1x,ifx2 is

differentiable on  , then ad-bc=

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a

2

b

1

c

-1

d

0

answer is C.

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Detailed Solution

fx=ax+b   if x1ax2+c  if    1<x2dx2+1x if    x2 is differentiable f is continuous f1-=f1+a+b=a+c  b=c f2-=f2+4a+c=4d+128a+2c=4d+1 f11-=f11+a=2aa=0 f12-=f12+2a2=d-14d=14 4d=1 8a+2c=4d+10+2c=1+1 c=1 ad-bc=0-c2=-1

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