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Grade: 12th pass 

                        
Yes I have a doud if z^2+z+1=0 then find the value of (z^2+1/z^2)+(z^4+1/z^4)+....(z^6+1/z^6)=?
2 years ago

Answers : (1)

Anish Singhal
askIITians Faculty
1194 Points 
							Answer is 0, put z=w(complex cube root of unity)
2 years ago
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