【用戶】Neng Kuan Lin
【年級】小一上
【評論內容】為方便計算,先把120+j200除40=3+j5Z=(3+j5)/7+j16 =(3+j5)(7-j16)/(7+j16)(7-j16).............同乘分母共軛,(a+b)(a-b)=a2-b2 =(101-j13)/[49-(-256)].........分子乘回40 =(4040-j520)/305 = 13.25-j1.705 Ω
【用戶】Neng Kuan Lin
【年級】小一上
【評論內容】為方便計算,先把120+j200除40=3+j5Z=(3+j5)/7+j16 =(3+j5)(7-j16)/(7+j16)(7-j16).............同乘分母共軛,(a+b)(a-b)=a2-b2 =(101-j13)/[49-(-256)].........分子乘回40 =(4040-j520)/305 = 13.25-j1.705 Ω
【用戶】Neng Kuan Lin
【年級】小一上
【評論內容】為方便計算,先把120+j200除40=3+j5Z=(3+j5)/ 7+j16 =(3+j5)(7-j16)/(7+j16)(7-j16).............同乘分母共軛,(a+b)(a-b)=a2+b2 =(101-j13)/305.........分子乘回40 =(4040-j520)/305 = 13.25-j1.705 Ω