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JEE Main 26-Aug-2021 Shift 1 Solved Paper

Section: Mathematics
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Question : 81 of 90
 
Marks: +1, -0
Let z=
1−i√3
2
 and i=√−1. Then the value of
21+(z+
1
z
)3+(z2+
1
z2
)3 +(z3+
1
z3
)3+...+(z21+
1
z21
)3 is
[26 Aug 2021 Shift 1]
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