Saved Bookmarks
| 1. |
Let alpha^(k) when k=0, 1, 2, 3, 4….253 are 254^(th) roots of unity then the unity digit of sum_(k=0)^(253)|z+alpha^(k)z^(2)|^(2) is ________ (where z=e^(i((2pi)/7))) |
|
Answer» |
|