申論題

2. (30%) Consider a finite quantum well in Fig. 1 with the potential energy of , where V₀＞0. Please answer the following questions:

(c) (14%) By dividing Eq. (1) by Eq. (3) and dividing Eq. (2) by Eq. (4), please show that
  
Then plot tanvs.x Also show that there always exists at least one quantum subband in this finite quantum well. tan()=