state gov UP Police SI (दरोगा) Mock Test Series 2025 Quantitative Aptitude Algebra Linear Equation in 2 or more Variables
If x/(y + z – x) = y/(z + x – y) = z/(x + y – z) = r, then r cannot take any value except___
1
- 1/2
2
1
3
1 or - 1/2
4
-1 or 1/2