历年数学四考研线性方程组部分.pdf

IP 59 77 1 116 1 x1 x2 a1 x2 x3 a2 x3 x4 a3 x4 x1 a4 a1 a2 a3 a4 1990 2 A aij 3 3 a11 1 b 1 0 0 T Ax b 2004 1 n Ax 0 A r Ax 0 1989 A r n B r n 2 A m n Ax 0 Ax b 1991 A Ax 0 Ax b B Ax 0 Ax b C Ax b Ax 0 D Ax b Ax 0 3 Ax b n m A r 1997 A r m Ax b B r n Ax b 1 C m n Ax b D r n Ax b 4 1 2 3 2007 A 1 2 2 3 3 1 B 1 2 2 3 3 1 C 1 2 2 2 2 3 3 2 1 D 1 2 2 2 2 3 3 2 1 4 1 2 3 Ax b A 3 1 1 2 3 4 T 2 3 0 1 2 3 T c Ax b x 2000 A 1 2 3 4 c 1 1 1 1 B 1 2 3 4 c 0 1 2 3 C 1 2 3 4 c 2 3 4 5 D 1 2 3 4 c 3 4 5 6 1 2x1 x2 4x3 3x4 4 x1 x3 x4 3 3x1 x2 x3 1 7x1 7x3 3x4 3 1987 2 x1 x2 2x3 3x4 1 x1 3x2 6x3 x4 3 3x1 x2 k1x3 15x4 3 x1 5x2 10 x3 12x4 k2 k1 k2 1988 2 3 x1 x2 x3 x4 x5 a 3x1 2x2 x3 x4 3x5 0 x2 2x3 2x4 6x5 b 5x1 4x2 3x3 3x4 x5 2 1 a b 2 3 1990 4 x1 2x2 2x3 0 2x1 x2 x3 0 3x1 x2 x3 0 A B 6 0 AB 0 1992 5 1 2 3 Ax 0 1 2 2 3 3 1 1994 6 x1 x2 x3 3 x1 x2 x3 2 x1 x2 x3 2 1995 7 x1 x2 2x3 3x4 0 2x1 x2 6x3 4x4 1 3x1 2x2 px3 7x4 1 x1 x2 6x3 x4 t p t 1996 8 I II I x1 x2 2x4 6 4x1 x2 x3 x4 1 3x1 x2 x3 3 II x1 mx2 x3 x4 5 nx2 x3 2x4 11 x3 2x4 t 1 1 I 2 II m n t I II 1998 3 9 x1 x2 x3 0 ax1 bx2 cx3 0 a2x1 b2x2 c2x3 0 1 a b c 2 a b c 1999 10 I 2x1 3x2 x3 0 x1 2x2 x3 x4 0 II 1 2 1 a 2 1 T 2 1 2 4 a 8 T 1 I 2 a I II 2002 11 x1 x2 x3 x4 0 2x1 x2 x3 2x4 0 3x1 2 x2 4 x3 4x4 1 1 1 1 1 T 1 2 x2 x3 2004 14 4 1 1 a 1 1 1 T 2 2 2 a 2 2 T 3 3 3 3 a 3 T 4 4 4 4 4 a T a 1 2 3 4 1 2 3 4 2006 15 x1 x2 x3 0 x1 2x2 ax3 0 x1 4x2 a2x3 0 x1 2x2 x3 a 1 a 2007 4 16 n Ax b A 2a1 00 a2