线性代数复习题五

一、填空题（每小题3分，共15分）abca2b2c2a3b3c3112,1，是3.EE3011x0a11102a.ax211a0x3设0,(0,.1212(,)fxxx2x2t。x2121122二、单项选择题（每小题3分，共15分）设kA为n（）．kA|B．kA．．knAnkA1设nAA0(*111AA*AAA11AAA*3.设ββAXb12（）11．B．．2．3221251212,B设A（）．A．*1．．ABA为n,AXX,AXX且则X,X(11122212121102第1页（共6页）三、计算题（共64分）111a2a2a31aa31a43a4a41a21aa2a3a412100121001210012)D32＝50xx,,,12及.xxxxyy51034yy12121212第2页（共6页）501800A132，B530521260求A1B2xx3xx112343x2x2x3x31234xx5x4x212347x5x9x10x81234（1（2第3页（共6页）1225731110给定向量组,,,,122430465140112311设向量2和12A1212量2.A12第4页（共6页）741A471xA44x，APPAP1第5页（共6页）(,,)4fxxxx2x2x2xx4xx4xx1231231213236axaxaaaa11112213.Aaaaaaxaxa211ax22223axaaa31132233第6页（共6页）《线性代数》统考试卷参考答案与评分标准《线性代数》统考试卷参考答案一、填空题（每小题3分，共15分）010230331111Tabcba)(ca)(cb)；,,；；1；33322t22。二、单项选择题（每小题3分，共15分）三、计算题（共64分）aaaaaa1a1aaaaaaa1a11122341234422341aa1aaaa1aa3412334)1aaa1aaaa1aaa23412342341aaaa1aaaaaaa123412342340000010101001aaaa512341aaaaaaa12342342100032012101210)D0121012100120012320121550123250xx由12＝34510yy123xxy2xxy50121122)94y64y51012yy1)12xx2)12.A82第1页（共3页）《线性代数》统考试卷参考答案与评分标准1231A19101158131015123XBA14568789115421085121311322330113930113933A1154201139300000000002618675910802x18x5x134xx,,为自由未知量。5x313x9x34234(；T0,8TT12,k,k为任意常数。kk01122121225712257311100771421,,,,)A1234524010614123004403011210011011230011000000100110101330011000000,,6123）；84123512A，A11122A2)A223A2A21212222252121248128816641620）77x3312x423,TT1212125T33A有3A6第2页（共3页）《线性代数》统考试卷参考答案与评分标准101P,,)0118123441122x1f(x,x,x)212x21232221x3f(x,x,x)x2x2x24xx4xx4xx123123121323x2x(2x2x)(2x2x)23x4xx3x32122231232323445(x2x2x)2x2xxx2)x212323223953335(x2x2x)2xx)2x212323333x2x2xxy2x5/3yy11233112322xxyyxyy2232233y