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Question

A straight line is such that its segment between the straight lines 5xy+4=0 and 3x+4y4=0 is bisected at the point (1,5) then its equation is :

A
83x35y+92=0
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B
83x85y+92=0
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C
83x+35y+92=0
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D
None of these
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Solution

The correct option is D None of these
5x1y1+4=0
3x2+4y24=0
Also x1+x22=1 & y1+y22=5
x1=2x2 y1=10y2
5x2+4+y2=0]×3
3x24+4y2=0]×5
y2=8/23x2=2023
y1=22223x1=2623
for equation of line
(y22223)=822223202623(x2623)[ use (yy1)=m(xx1)]
107y3y92=0

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