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Q.

⨍ (x)=ax+1+bx-1 is continuous atx=1, here x denotes greastest integer function then

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a

a+b=0

b

a-b=0

c

2a-b=0

d

a-2b=0

answer is A.

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Detailed Solution

fx=ax+1+b[x-1]

fx=ax+1+bx-1]

=a+bx+(a-b) is continuous at  x = 0

limx1-fx=limx1+fxlimx1-a+bx+a-b=limx1+a+bx+a-ba+b0+a-b=a+b1+a-b a+b=0

 

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