Discuss Forum
1. If xy>0 and x<0, which of the following must be negative?
- A. -x
- B. -x
- C. -x
- D. -x
Answer: Option B
Explanation:
Here, x<0 or, x is negative.
Now, if y is positive, the multiply of x & y will be negative.
Therefore, xy>0 is possible only if y is negative or y<0. Then, xy = ( - ve) x ( - ve) = + ve >0.
Post your comments here: