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Grade 12th passAlgebra

If z1 and z2 are two complex number then choose the correct option.

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Profile image of Atharv Pandey
7 Years agoGrade 12th pass
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1 Answer

Profile image of Aditya Gupta
7 Years ago
let z1/z2= z
then |z+1|=|z –1| (given)
so distance of z from 1 and – 1 is equal, which is possible iff it lies on perpendicular bisector of the join of – 1 and 1.
the perpendicular bisector just so happens to be the imaginary axis. since arg is given to be never m*pi, so z cannot be zero. hence, z=z1/z2 is always a purely imaginary number.