The expression that is equivalent to (1 + (1/y))/(1 - (1/y)) is; (y + 1)/(y - 1)
We want to find the expression that is equivalent to;
(1 + (1/y))/(1 - (1/y))
Let us first simplify the numerator (1 + (1/y))
By using LCM method, we can express the numerator as;
(y + 1)/y
Similarly, for the denominator we have;
(1 - (1/y)) = (y - 1)/y
Thus the original expression is now;
((y + 1)/y)/((y - 1)/y)
y will cancel out to give us;
(y + 1)/(y - 1)
Read more about simplification of fractions at; https://brainly.com/question/17083350