先把3A與2A電流源合併,變成5A
先看5A,2A電流源斷路
IX = 5 × 22+2 = 2.5A --(1)
再看2A,5A電流源斷路
IX = 2 × 11+3 = 0.5A --(2)
IX = 2.5 + 0.5 = 3A