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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)=?
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

Anish Singhal
1194 Points
```							Answer is 0, put z=w(complex cube root of unity)
```
2 years ago
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### Course Features

• 101 Video Lectures
• Revision Notes
• Test paper with Video Solution
• Mind Map
• Study Planner
• NCERT Solutions
• Discussion Forum
• Previous Year Exam Questions