Question

佩

請問這題要怎麼算。謝謝

10.
w=cos-
2元
7
= cos 27
-
+isin-
2元
,
7
5.
6
則8(0+0°+二)(0²+0+)(0² + 0 + +
(0² *+ √) (0³² + 0* + \ ) =
5.
5
答:43
W₁ = 1
x + x 5+ ... + x + 1 = (x-W) (x-w') (x-w³) (x- w*) (x - W') (x-w')