- #1
- 16
- 0
The correct answer is (1/y) - (1/xy) but i don't understand why
What does the sum of xy not equaling zero imply that we can do to the equation to solve it?
GRE Sample Question, explanation? Thanks
- Thread starter Brown399
- Start date
-
- Tags
- Explanation Gre Thanks
The correct answer is (1/y) - (1/xy) but i don't understand why
What does the sum of xy not equaling zero imply that we can do to the equation to solve it?
- #2
Mark44
Mentor
- 37,352
- 9,536
If xy != 0, then neither x nor y = 0.
Rewrite (x - 1)/(xy) as two separate fractions. What do you get?
Rewrite (x - 1)/(xy) as two separate fractions. What do you get?