初始条件 l(0)=2(0+)=l1(0)=元7 4 i,(0)=i1(01)=0 2求这组方程的拉氏变换 21(s)+Sl1(s)-l12(0)-l2(s) S 4 41(s)+42()+-l2()= s+2 斛联立代數方程組得初始条件 (0 ) (0 ) 0 4 1 (0 ) (0 ) (0 ) 1 = = = = = − + − + − L L c c i i u u u V 2.求这组方程的拉氏变换 2 1 ( ) 4 4 ( ) 4 ( ) 1 2 ( ) ( ) (0 ) ( ) 1 2 2 1 1 2 2 + − + + = + − − = − s u s s u s u s s u s su s u u s c 解联立代数方程组得