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وارد شوید

JEE Advance - Mathematics (1981 - No. 11)

The complex numbers $$z = x + iy$$ which satisfy the equation $$\,\left| {{{z - 5i} \over {z + 5i}}} \right| = 1$$ lie on
the x-axis
the straight line y=5
a circle passing through the origin
none of these

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