Straight Lines and Pair of Straight Lines Part 2
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Let a ray of light passing through the point ( 3 , 10 ) reflects on the line 2 x + y = 6 and the reflected ray passes through the point ( 7 , 2 ) . If the equation of the incident ray is a x + b y + 1 = 0 , then a 2 + b 2 + 3 a b is equal to_.
[8 Apr 2024 Shift 2]
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