Quantitative analysis: Suppose n=1, from. R R 2en2+==k 2 k =(2k+1) 2 k 2e,+ 3kmax…(1) 2e,+ k (2k+1)/2 in(2)k r R O R O’ Quantitative analysis: k e Suppose n=1, From: 2 (2 1) 2 2 2   ek n + = k +   e n k k + = 2 2 2 {   e k k + = 2 2 max…(1) { (2 1) / 2 2 2   ek + = k + min…(2) k r n=1