1.

Suppose a, b are real numbers such that ab ≠ 0. Which of the following four figures represents the curve (y – ax – b)(bx2 + ay2 – ab) = 0 ? 

Answer»

Correct Option :- (B)

Explanation :-

 y = ax + b and x2/a + y2/b= 1

slope = a 

for the line, y intercept = b

Fig.1 for line → a < 0 , b > 0 hence the other fig. cannot be an ellipse 

Fig.2 a > 0 , b < 0 hence the fig. is a hyperbola 

Similarly you can check rest 2 options



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