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Question

Find the equation of the straight line segment whose end points are the point of intersection of the straight line 2x−3y+4=0, x−2y+3=0 and the midpoint of the line joining the points (3,−2) and (−5,8).

A
x+2y5=0
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B
x+2y+5=0
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C
x2y5=0
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D
None of these
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Solution

The correct option is A x+2y5=0
The given lines are
2x3y+4=0 ....(1)

And
x2y+3=0 ........(2)

(1)(2)×2

2x3y+4=0
2x4y+6=0
¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯0+y2=0

y=2 substitute in (1)

x2(2)+3=0
x1=0
x=1

The point of intersection is
(1,2)

Mid point of line joining the points (3,2) and (5,8)

=(352,2+82)

=(22,62)=(1,3)

So, the required line is
y2=3211(x1)

y2=12(x1)

2y+4=(x1)

x+2y5=0

Hence, this is the answer.

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