黑x1a1+x2a21+…+xa x∑knB+x2∑k j2/j +…x∑k月 j=1 j=1 =∑(xkm1+x2k12+…x,kn)B j=1 生=点 庄现考察齐次线性方程组 an1x+a12x2+…+a1,x,=0 a21x1+a22x2+…+a2xX。=0 an1x1+a12x2+…+anx,=0 上页    = = = = = + + = + + + + + t j j j s j s j t j s jss j t j j j t j j j s s x k x k x k x k x k x k x x x 1 1 1 2 2 1 1 2 2 1 1 1 1 1 2 2 1 ( )           = = = t j s i k ji xi j 1 1 ( )        + + + = + + + = + + + = 0 0 0 : 1 1 2 2 2 1 1 2 2 2 2 1 1 1 1 2 2 1 t t t s s s s s s a x a x a x a x a x a x a x a x a x     现考察齐次线性方程组