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3. Coordinate Geometry
easy
The points whose abscissa and ordinate have different signs will lie in
A
$I$ and $II$ quadrants
B
$II$ and $III$ quadrants
C
$II$ and $IV$ quadrants only
D
$I$ and $III$ quadrants only
Solution
In $II$ quadrant, all $(x, y)$ lie with $x<0$ and $y<0 .$ In quadrant $I V,$ all $(x, y)$ lie with $x>0$ and $y<0 .$
So, the point whose abscissa and ordinate have different signs will lie in $II$ and $IV$ quadrants only.
Standard 9
Mathematics
