线性代数作业答案第一章第二节.pdfVIP免费

3.求以下行列式的值.122222221222222222220222(1)22122212021222222202222222222232201002(2)!221200302220002Dnnnnnnnnnnn(2)(3)教材例题.11212212(4),0,1,2,,.nninnaxaaaaxaDxinaaax其中1211121222221122121222222122=111nininnnininnninnninnnnniinnnnnaxaaaxaaaaxaaxaxaDaaaxaxaaxaaxaaaxaxaxaaaaxxaax解：212221211111222111222110000001nnniinnnnnnniiiiiiiiiinniiiiinniiiiiaaxaaxxxxaxxxxxxaxxaxxxxxaaxaxx第三节111.(1)11nnnnababbabaabDabbabaabbaab2(2)nabababDbababa21212112222221222222200001000011nnnnnnnabbabababbaabbabaabaaDbDabDabD222222,nnabDabDabba又因为2222111(1)21(1)2011111212(3)121!11!11!!1!1!1!1nnnnnnijjinnnnnniaaaanaaaanDaaaanxxnnnnni221231232(4)2122233(1)1(1)2(1)31230,3.2222(1)1(1)2(1)3nnnnnDnnnnnnnnnnnnnnnnnnnnnnnnnnnn当1222;3411.nDnD当时,当时,1221111122121232311221221111(5)1(1)(1),21.kkkkkkkkkkkkkkkkkkkkkkkkiiixxxDxaaaaxaDxDaxDaxxDaaxDxaaxDxaxaaxaxkxDxxaaaxa解：按第一列展开：其中222211(6)11xxxxxDxxxxx221222(3)1123222232232222222212222122226220(1),()(),11(1)2(1),11(1),1,.(2nnnnnnnnnnnnnnnnnnnnkkDxDxDDDxDDxDDxxDxxxxxxxxxxDxxxxDDxDDxDxxxxxDxn...