A^(-1) 是范德蒙矩阵，|A^(-1)| = (2-1)(3-1)(3-2) = 2, 则 |A| = 1/2.A^(-1) = A*/|A| , 则 A* = |A|A^(-1) =[1/2 1/2 1/2][1/2 1 3/2][1/2 2 9/2]
