Let us assume a solution i(t=Ae, where a and S, are constant to be determined d(Ae R(Ae”)+L 0 R RAel+ lasel=o or A(s,+el=0 R the solution are S, L ∴i(t)=AeL if i(t) I。→A=I, 0 ..i( t)=1o 2R Pr=Ri= RIoe l It =RI R PR dt 0 L LIo)t L R R p Ri RI e 2 2 0 2 − = = Let us assume a solution i(t)=A , where A and s1 are constant to be determined. s t e 1 0 ( ) ( ) 1 1 + = dt d Ae R Ae L s t s t 0 ( ) 0 1 1 1 + 1 = 1 + = s t s t s t e L R RAe LAs e or A s L R the solutionare s1 = − t L R i(t ) Ae −  = t L R i t I e −  = 0 ( ) ) 2 1 ( 2 1 2 0 2 0 2 0 2 0 0 w p dt R I e dt LI w LI L t L R R = R = = = =   −   0 0 I A I t 0 i f i( t ) = → = =