PointHard
Question
A ray of light passing through the point A (1, 2) is reflected at a point B on the x-axis line mirror and then passes through (5, 3). Then the equation of AB is
Options
A.5x + 4y = 13
B.5x - 4y = - 3
C.4x + 5y = 14
D.4x - 5y = - 6
Solution
Images of (5, 3) in x-axis
is (5, -3)
Now, line AB will also
pass through (5, -3)
∴ equation of AB is y - 2 =
(x - 1)5x + 4y = 13
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