For f(x)=x2−1x−1f(x) = \frac{x^2 - 1}{x - 1}f(x)=x−1x2−1, how can we make fff continuous at x=1x = 1x=1?
Define f(1)=0f(1) = 0f(1)=0
Define f(1)=2f(1) = 2f(1)=2
Define f(1)=1f(1) = 1f(1)=1
It is impossible to make fff continuous at x=1x=1x=1