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Q.

Let z1,z2,z3 be three complex numbers such that z1+z2+z3=i,z1z2+z2z3+z1z3=1,z1z2z3=i. Let minimum value of |z1kz2+(k1)z3|k[0,1]  equals ‘a’ and minimum value of |zz1|2+|zz2|2+|zz3|2zC  is ‘b’ (where i=1, C is set of complex numbers)

 

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Detailed Solution

zi=1,1,i ; a = min. of  |z1kz2+(1k)z3k+(1k)|=1

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Let z1,z2,z3 be three complex numbers such that z1+z2+z3=i,z1z2+z2z3+z1z3=−1,z1z2z3=−i. Let minimum value of |z1−kz2+(k−1)z3|∀ k∈[0,1]  equals ‘a’ and minimum value of |z−z1|2+|z−z2|2+|z−z3|2∀ z∈C  is ‘b’ (where i=−1, C is set of complex numbers)