f(x)=x2+1/(x-1)-1 হলে, নিম্নের কোনটি সঠিক?

A    f(0)=oc

B    f(1)=-1

C    f(1)=0

D    f(-1)=-1/2

Solution

Correct Answer: Option D

 

f(x) = x2+1/(x-1)-1

f(-1) = (-1)2+1/(-1-1)-1 = 1 + 1/(-2) -1 = 1/(-2) = -1/2

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