Question
Question: The equation of the line passing through the point \(\left( x ^ { \prime } , y ^ { \prime } \right)\...
The equation of the line passing through the point (x′,y′) and perpendicular to the line yy′=2a(x+x′) is.
A
xy′+2ay+2ay′−x′y′=0
B
xy′+2ay−2ay′−x′y′=0
C
xy′+2ay+2ay′+x′y′=0
D
xy′+2ay−2ay′+x′y′=0
Answer
xy′+2ay−2ay′−x′y′=0
Explanation
Solution
Slope = 2a−y′ .
Hence equation is y′x+2ay=y′x′+2ay′ .