9665
簡單計算的問題!!麻煩各位了!!
y(t)=1+e^-t sin2t-e^-t cos2t(題目)當t=0.946 時代入 y(0.946)=1+e^-t sin2t-e^-t cos2t =0.631(不等於答案1.49)改成y(0.946)=-1+e^t (cos2t-sin2t) =1.49為什麼要變成第二個才能算出答案(1.49)呢??我搞不太懂??
9665
y(t)=1+e^-t sin2t-e^-t cos2t(題目)當t=0.946 時代入 y(0.946)=1+e^-t sin2t-e^-t cos2t =0.631(不等於答案1.49)改成y(0.946)=-1+e^t (cos2t-sin2t) =1.49為什麼要變成第二個才能算出答案(1.49)呢??我搞不太懂??
9665
Factors自由度平方合均方(variance)F valueF0.05F0.01A 2 18.9399.47 5.9665.7913.27B 2 61.83230.916 19.476 5.7913.27C 2 72.07536.037 22.703 5.7913.27D 2 11.59 5.795 3.6515.79 13.27E 2 12.088 6.044 3.8085.79 13.27F 2 0.134 0.067 0.042 5.79 13.27Error 5 7.937 1.587Total17 184.595
9665
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9665
可以幫我代製樂果嗎?? 第一ㄍ 底圖網址 字要打楓糖 顏色是藍色或紫色底圖網址 http://img132.imageshack.us/img132/7608/70207604tg7.jpg第二個樂果底圖http://img255.imageshack.us/img255/9665/65173892ds9.gif字打小涵 顏色是藍色 謝謝大大