VR = Vab - (-4 ) = 3 + 4 = 7v
( 10 + 4 ) / ( 1 + R ) * R = 7
7R = 7,R = 1
10*R/(R+1)-4*R/(R+1)=3
R=1
V-10/1+V+4/R=0
帶入已知V=3
得R=1
36 某電路如圖所示,若欲使Vab = 3 伏特,則電阻器R為多少Ω? ..-阿摩線上測驗