Questions
If , then the set of lines passes through the fixed point is
a
3,5
b
−3,−5
c
3,5,−3,−5
d
No fixed point
detailed solution
Correct option is D
The given condition is 9a2+25b2−c2+30ab=0This can be rewrite as3a+5b2−c2=03a+5b−c3a+5b+c=0It implies that 3a+5b−c=0, or 3a+5b+c=0 comparing the above equations with ax+by+c=0. x=−3,y=−5 or x=3,y=5 Therefore, the fixed points are (−3,−5) or (3,5)Talk to our academic expert!
Similar Questions
If the lines ax+by+c = 0, bx+cy+a = 0 and cx+ay+b=0 are concurrent then the point of concurrency is
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