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Question

The point whose abscissa is equal to its ordinate and which is equidistant from A(5,0) and B(0,3) is

A
(1,1)
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B
(2,2)
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C
(3,3)
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D
(4,4)
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Solution

The correct option is D (4,4)
Let P(x,y) be the point which is equidistant from A(5,0) and B(0,3)

Given that in P, abscissa is equal to ordinate i.e., x=y. Also it is given that AP=BP

(x5)2+(x0)2=(x0)2+(x3)2

Squaring on both sides

(x5)2+x2=x2+(x3)2

x2+2510x+x2=x2+x2+96x

2510x=96x

4x=16

x=4

Therefore the point is (4,4)

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