x + 1/ x − 1. how do i evaluate each expression for each value of x? for (a) x=1? and (b) x=-1?

Question

Evaluate each expression of each value?

Answer 1

(x+1)/(x-1)

 

a)  x = 1:  

   (1+1)/(1-1) = 2/0

      No answer because we cannot divide by zero

      so this is undefined

 

b) x = -1

    (-1+1)/(-1-1) = 0/(-2) = 0