设五个电阻的电流分别为i1、i2、i3、i4、i5，方向向下或向右，则有：i1＝i2＋i3i3＋i5＝i412＝i1R1＋i2R2i2R2＝i3R3＋i4R4i5R5＝i1R1＋i3R3解得：i1＝……
