→ suhorng :他是實係數方程式 若 a+bi 是一根 a-bi 代進去也是0 03/11 14:35
→ SS327 :為什麼a-bi 代進去也是0阿? 03/11 14:58
→ suhorng : _ 03/11 15:20
→ suhorng :設 x 表示 x 的共軛複數, 則 a_i = a_i (實係數) 03/11 15:20
→ suhorng : _ _ _______ ____ 03/11 15:20
→ suhorng :f(x)=Σa_i x^i = Σa_i x^i = f(x) 03/11 15:20
→ suhorng : _ ____ _ 03/11 15:20
→ suhorng :所以若 f(c) = 0, 則 f(c) = f(c) = 0 = 0 03/11 15:20
→ SS327 :恩恩會嚕 謝謝 03/11 15:51