Maths-
General
Easy
Question
A ray of light passing through the point A (1, 2) is reflected at a point B on the x-axis and then passes through (5, 3) Then the equation of AB is
- 5x + 4y = 13
- 5x – 4y = – 3
- 4x + 5y = 14
- 4x – 5y = – 6
The correct answer is: 5x – 4y = – 3
]
But x + 
> 0; \ 
Þ x > 0 (ii)
From (i) & (ii) x > 1; 
Take antilog, log2
>1
Take antilog > 2; 
< 0 Þ xÎ(–5, –2)
But not true as x > 1
Now find equation of AP¢
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