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Question

Area of triangle formed by line x+y=3 and bisectors of pair of straight lines x2y2+2y=1 is

A
2
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B
4
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C
6
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D
8
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Solution

The correct option is A 2
The given lines are x2(y1)2=0 or xy+1=0, x+y1=0
Their bisecots are x=0,y=1. The sides of the triangle are x=0,y=1 and x+y=3
Solving in pairs the vertices of ABC are (0,1),(0,3) and (2,1). One side along y-axis
Area =12b×h=122.2=2

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