[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fT8-3eVFQKcs97hVh3KiOyr5clZJgo_3rfTxCGamy5aI":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":16,"related":17,"source":27,"type":28},[],"2026-05-23 00:39:39",382662732,[8,9,10,11],"下三角","上三角","对角","无法确定",{"courseId":13,"courseImg":14,"courseName":15},"53e1d2ef4961cca8eea3e23969ad2cb9","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F03a579384a6dc297c89809b582fcc767.png","默认课程","在矩阵\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F99f5dae0e840371b7f871046cbb30487.png\">中,若当i<j时有\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fde5bda70f03134dcffddf490481b3194.png\">,则称A为?矩阵( )",[18,29,32,41,50,59,68,77,87,96],{"answer":19,"createTime":5,"id":20,"options":21,"question":26,"source":27,"type":28},[],382662730,[22,23,24,25],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F69749f165ec94fce85b9fd62236aa75e.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fd0add6c8af73dc21233819e39d7afd51.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F69f29f2c6061f96820ae33ce3fa4780b.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F00a32ae366291b2311e630b0287c1639.png\">","找出以下矩阵中的对角阵( )","v1",0,{"answer":30,"createTime":5,"id":6,"options":31,"question":16,"source":27,"type":28},[],[8,9,10,11],{"answer":33,"createTime":5,"id":34,"options":35,"question":40,"source":27,"type":28},[],382662734,[36,37,38,39],"元素全为1的矩阵称为单位矩阵","设对角矩阵\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F6605fa4f43f0d08e809c7aac504a2cce.png\">,当\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F47ec2dd0af7b6e6028ade261fabacfd0.png\">时,称\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F16f8b4532b2b1783c85ba709f08947a8.png\">为数量矩阵","两个零矩阵相加,和仍为零矩阵","矩阵\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Ff7d486c71333263a85d4ce987ec3e38b.png\">是一个二阶反对称矩阵","以下命题中正确的是( )",{"answer":42,"createTime":5,"id":43,"options":44,"question":49,"source":27,"type":28},[],382662736,[45,46,47,48],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F9c13c71ac0222fd4d44baf971396071d.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F76e183b71d64a09d934dd88955a78fb3.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F62f7d97230567f86df6244380bba94d9.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fc2c40152c9038051cab9c33dd4b1697b.png\">","设矩阵\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fc5dbe3df73f238b016d31270fbcf6fc2.png\">,则\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F3fe29d468a73134eaf0c46a7e208cc0d.png\">( )",{"answer":51,"createTime":5,"id":52,"options":53,"question":58,"source":27,"type":28},[],382662737,[54,55,56,57],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fc6cff0e23ccf49b45f17da861ccf7bc0.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F8a8df918208a32f7cb01533c6ae93bf3.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F02b3f21a542b4ac56bc1bb33affda241.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F10ae3ecf39bd4197620cabbb48a77985.png\">","设矩阵\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F142ecfe60700643484c63f6dbe2c394a.png\">,且\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F63bca2073cc37cc2107a7cd1fab456d2.png\">,则\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F31a512e43035a3d01a54b41424ea9a2d.png\">( )",{"answer":60,"createTime":5,"id":61,"options":62,"question":67,"source":27,"type":28},[],382662738,[63,64,65,66],"6","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Ff5b3ebb226ac94baa0d3720a162b7bf3.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Ff513e508278f56a816aa5d47f99f5277.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F71d907ecdf37ce5e288434cb5c26df7b.png\">","若n阶矩阵的行列式为\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F047cc4f1e15a03355f5a066a74fee29e.png\">( )",{"answer":69,"createTime":5,"id":70,"options":71,"question":76,"source":27,"type":28},[],382662739,[72,73,74,75],"(kl)A=l(kA)","k(A-B)=kA-kB","若kA=O,则A=O","A-B=A+(-B)","设A,B为同型矩阵,k,l为数,则以下结论中错误的是( )",{"answer":78,"createTime":5,"id":79,"options":80,"question":85,"source":27,"type":86},[],382662740,[81,82,83,84],"A+B","A-B","AB","lA","设A,B为n阶对称矩阵,则下列矩阵为对称矩阵的是( )",1,{"answer":88,"createTime":5,"id":89,"options":90,"question":95,"source":27,"type":86},[],382662741,[91,92,93,94],"反对称矩阵一定是方阵,且主对角线元素全为0","对称矩阵的第i行元素与第i列元素对应相等,其中i=1,2,...,n","若A为奇数阶反对称矩阵,则有|A|=0","任意一个n阶矩阵A都可以表示为一个对称矩阵\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fc88a0f54aef581e50eb664bc15612f4e.png\">和一个反对称矩阵\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F202a752571319ea686345545f822abe9.png\">之和","下列结论正确的是( )",{"answer":97,"createTime":5,"id":98,"options":99,"question":104,"source":27,"type":86},[],382662742,[100,101,102,103],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F4d33e123c7aeaca2db4e0c6388287b99.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fa89bb10085267a5f58c6eceed33eabd8.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Ff1e3d43d0c82021b6a1040a7fd537348.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F6ffcd4da14e1d9e92522874692d0f228.png\">","设A为n阶方阵,则下列关于方阵A的行列式说法正确的有( )"]