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Question

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

A
2 sq. units
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B
4 sq. units
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C
6 sq. units
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D
8 sq. units
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Solution

The correct option is A 2 sq. units
Equation of angle bisector of x2y2+2y1=0 x2y12=0 is

x2(y1)21(1)=x(y1)0x(y1)=0

x=0 or y1=0
Area of traingle=12×base×height

Area of triangle =12×2×2=2 sq. units

389684_50450_ans.PNG

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