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Question

Find the equation of the curve formed by the set of all points whose distances from the points (3, 4, -5) and (-2, 1, 4) are equal.

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Solution

Let P(x, y, z) be any point on the given curve, and let A(3, 4, -5) and B(-2, 1, 4) be the given points.

Then, PA=PB

PA2=PB2

(x3)2+(y4)2+(z+5)2=(x+2)2+(y1)2+(z4)2

10x+6y18z29=0.

Hence, the required curve is 10x+6y-18z-29=0.


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