d4+k2y,=0 dx2 d业-k2y,=0 dx2 d4+k2y,=0 dx2 V(x)=Heih +'e-ikx 解为 V2(x)=Betax+B'e-tax W3(x)=Cei+C'e-ikx上页 下页 返回 退出 解为 2 1 2 2 1 1 2 2 2 2 2 2 2 3 2 2 1 3 d 0 d d 0 d d 0 d k x k x k x       + = − = + = 1 1 2 2 1 1 1 2 3 ( ) ( ) ( ) k x k x k x k x k x k x x A A x B B x C C    − − − = +    = +    = +   i i i i e e e e e e