The positive solutions of the equation ax + by + c = 0 always lie in the
(A) 1st quadrant
(B) 2nd quadrant
(C) 3rd quadrant
(D) 4th quadrant
Answer:
(A) 1st quadrant
Solution:
In 1st quadrant the value of x and y are positive
In 2nd quadrant the value of x is negative and y is positive
In 3rd quadrant the value of x is negative and y is also negative
In 4th quadrant the value of x is positive and y is negative.
Hence for the positive solution of the given equation, both the values of x and y must be positive. Therefore option (A) is correct.