11+22+.+ y2=021+0222+.+ ym=m1+m北+. 2 A= 022 2n 系数矩阵 ●●● 。● C心n       = + + + = + + + = + + + . , , 1 1 2 2 2 2 1 1 2 2 2 2 1 1 1 1 1 2 2 1 m m m mn n n n n n y a x a x a x y a x a x a x y a x a x a x                   = m m mn n n a a a a a a a a a A        1 1 21 22 2 11 12 1  系数矩阵