[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fEupIOGZdB3UzC9o0fPsnzfMNi_HdKrnMFwnqkxVbTKw":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":16,"related":17,"source":27,"type":28},[],"2023-10-15 20:20:43",100048238,[8,9,10,11],"A=O或B=O","A=O且B=O","detA=0或detB=0","BA=O",{"courseId":13,"courseImg":14,"courseName":15},"6c91b88572b0bffc6b7e8992a6ed062f","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F7e2d5ad53be3d12aacc56ee37db405b7.jpg","线性代数","设A、B均是n阶方阵,满足等式AB=O,则必有",[18,29,32],{"answer":19,"createTime":5,"id":20,"options":21,"question":26,"source":27,"type":28},[],100048234,[22,23,24,25],"m=t","n=s","m=s","n=t","设A是\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Ff3afec00ae70f07d6a15e98ee4404775.webp\">矩阵,B是\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F01a31b626625bd3bc69630c50db90d8e.webp\">矩阵,若矩阵乘积AB有意义,则必须满足()","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},[],100048240,[36,37,38,39],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F572ac2163dadb40334f7f002f87af6dc.webp\">","kdetA","-kdetA","|k|detA","设n阶方阵A的行列式是detA,则kA(k为非零整数)的行列式为()"]