Straight Lines and Pair of Straight Lines Part 2

Section: Mathematics
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Question : 28 of 72
 
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Let a ray of light passing through the point (3,10) reflects on the line 2x+y=6 and the reflected ray passes through the point (7,2). If the equation of the incident ray is ax+by+1=0, then a2+b2+3ab is equal to_.
[8 Apr 2024 Shift 2]
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