v1*(R2/R1+R2)+V2*(R1/R1+R2)=1*(7/3+7)-1*(3/3+7)=4/10=2/5
Vo=2/5*(1+Rf/Ra)=2/5*(1+19)=2/5*20=8(V)
5 圖示理想運算放大器電路,若 R1 = 3 kΩ、R2 = 7 kΩ、Ra =..-阿摩線上測驗