JEE Advanced Model Paper 14 with solutions for online practice

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Question : 57 of 60
 
Marks: +1, -0
Let z1,z2 , ..... , zn be equi - modular non - zero complex numbers such that z1+z2 + ..... zn = 0 . Then Re (
n
Σ
j=1
n
Σ
k=1
Zj
Zk
)
is equal to .....
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