1.

In Argand diagram all the complex numbers z satisfying `|z-4i|+ |z +4i|= 10` lie on a (A) straight line (B) circle (C) ellipse (D) parabola

Answer» here, `PS_1 + PS_2 = constant`
P is an ellipse
`|PS_1| - |PS_2| = `constant
P is on hyperbola
`|PS_1 - PS_2| = `C
So option C is correct


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