1.

If |z1|=|z2|=|z3|=|z4|=1 and z1+z2+z3+z4=0then least value of the expressionE=|z1−z2|2+|z2−z3|2+|z3−z4|2+|z4−z1|2 is

Answer»

If |z1|=|z2|=|z3|=|z4|=1 and z1+z2+z3+z4=0

then least value of the expression

E=|z1z2|2+|z2z3|2+|z3z4|2+|z4z1|2 is





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