SAT I 每日一問:2012年11月12日
The Correct answer is C.
Explanation
In order for? ?to satisfy?, it must be true that?, which is in?quadrant?.
In?quadrant?,?all the??values are negative and all the?>values?are positive, so inquadrant?,??and??cannot be equal. For example, the pair??does not satisfy the condition, since?, not?.
In quadrant?,?the??values and the??values are both negative, so it is possible for??and??to be equal. For example, the pair??is in?quadrant??and?.
In quadrant?,??and??cannot be equal because the??values?are positive and the??values are negative. For example, the pair??does not satisfy the condition, since?.
The quadrants that contain pairs??that satisfy the given condition are quadrants?and??only.