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Question

The equation to the locus of a point which is always equidistant from the points (1,0) and (0,2) is:

A
2x+4y+3=0
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B
4x+2y+3=0
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C
2x+4y3=0
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D
4x+2y3=0
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Solution

The correct option is A 2x+4y+3=0
Let the point which is equidistant from the given points be (x,y)
Using the distance formula , we have
(x1)2+(y0)2=(x0)2+(y+2)2 Squaring both the sides, we get
x22x+1+y2=x2+y2+4y+42x34y=02x+4y+3=0
Option A is correct

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