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Question

Locus of the image of the point (2,3) in the line (2x3y+4)+k(x2y+3)=0, kR is a

A
Straight line parallel to x-axis
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B
Straight line parallel to y-axis
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C
Circle of radius 2
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D
Circle of radius 3
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Solution

The correct option is C Circle of radius 2

We have,

Given point are (2,3)

Equation of line is (2x3y+4)+k(x2y+3)=0 such that kR


From given equation,

2x3y+4=0......(1)

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


From equation (1) and (2) to and we get,

x=1

y=2


Now,

Using distance formula and we get,

Point(2,3) and (1,2)then,

(21)2+(32)2

12+12=2

Then circle of radius is =2


Hence, this is the answer.

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