Q.

The image of the line x + 2 y = 5with respect to the line x - y = 2 is

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a

2xy=7

b

2x+y=7

c

x+y=2

d

x2y=7

answer is D.

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Detailed Solution

Equaation of the Image of the line ax+by+c=0  with respect to the line lx+my+n=0 is ax+by+clx+my+n=2(al+bm)l2+m2

x+2y5xy2=2(1(1)+2(1))1+1, x+2y5=-xy2 2x+y=7 

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