XAT 2024 — QA & DI Question 12
2 Variable EquationsEasy
Consider the system of two linear equations as follows: 3x + 21y + p = 0; and qx + ry – 7 = 0, where p, q, and r are real numbers.
Which of the following statements DEFINITELY CONTRADICTS the fact that the lines represented by the two equations are coinciding?
Answer & solution
- A
p and q must have opposite signs
- B
The smallest among p, q, and r is r
The largest among p, q, and r is q
- D
r and q must have same signs
- E
p cannot be 0