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Question

Assertion :Let z be a complex number.
The equation |z - 1| - |z - i| = 1 represents a part of hyperbola. Reason: The equation |zz1||zz2|=k is a hyperbola.

A
Both (A) & (R) are individually true & (R) is correct explanation of (A).
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B
Both (A) & (R) are individually true but (R) is not the correct (proper) explanation of (A).
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C
(A) is true (R) is false.
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D
(A) is false (R) is true.
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Solution

The correct option is C (A) is true (R) is false.
The equation ||zz1||zz2||=k is a hyperbola only if
k<|z1z2|
Here k=1 & |z1z2|=21
z1=1,z2=i
Reason is false and Assertion is true.

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