Question
Question: If a<sub>1</sub>x + b<sub>1</sub>x + c<sub>1</sub> = 0, a<sub>2</sub>x + b<sub>2</sub>y + c<sub>2</s...
If a1x + b1x + c1 = 0, a2x + b2y + c2 = 0 and
a3x + b3y + c3 = 0 are three lines and D = a1a2a3 b1 b2 b3c1c2c3 then the lines will form a triangle if
A
D = 0,a1b2 – a2b1 = 0
B
D = 0, a2b3 – a3b2¹ 0
C
D ¹ 0
D
None of these
Answer
D ¹ 0
Explanation
Solution
If these lines form a triangle then point of intersection of any two lines must not lie on third line, D ¹ 0