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Question

The curve represented by Im(z)2=c(c0) is
  1. a circle
  2. an ellipse
  3. a hyperbola
  4. a rectangular hyperbola

A
an ellipse
B
a circle
C
a rectangular hyperbola
D
a hyperbola
Solution
Verified by Toppr

Let z=x+iy
(z)2=x2y2+2ixy
Im(z)2=Im(x2y2+2ixy)
=2xy=c (given)
xy=c2 which is a rectangular hyperbola.

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