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Question

Find a point on y-axis which is equidistant from the points (5,2) and (3,2).

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Solution

Let P(0,y) be any point on y-axis. and A(5,2) and B(3,2). Then,

PA=PB (Given)

PA2=PB2

(50)2+(2y)2=(30)2+(2y)2

25+4+4y+y2=9+4+y24y

8y=16

y=2

Hence, the required point is (0,2)

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