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Question

Locus of z such that |zz1||zz2|=λ (constant) is:

A
Circle
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B
Parabola
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C
Ellipse
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D
Hyperbola
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Solution

The correct option is D Hyperbola
Difference of distances of a point from two fixed points z1 and z2 is constant.
Thus this is the basic definition of a hyperbola.

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