[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fyPXxffuJsaALHGz1aoFMMygThyXQQCRMnolW1OW5NBU":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":19,"related":20,"source":30,"type":31},[],"2026-05-18 16:11:50",376310892,[8,9,10,11],"0.24","0.73","0.96","0.32",{"count":13,"courseId":14,"courseImg":15,"courseName":16,"workId":17,"workName":18},36,"ed37ac498fd86b53053d347f4b87fb65","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F8b0fc860141807dd44e8a873f78ccef8.png","工程数学实践","exam_169352095","2023级工程数学实践平时测试","在一项市场调研中,发现某品牌的产品在市场上的占有率为40%,其余60%的市场份额由其他品牌占据.一个消费者如果他是忠实用户,他购买该品牌的产品的概率是80%,如果不是忠实用户,购买该品牌产品的概率是20%.如果一个消费者购买了该品牌的产品,那么他是忠实用户的概率是多少",[21,32,41,50,59,68,77,80,87,94],{"answer":22,"createTime":5,"id":23,"options":24,"question":29,"source":30,"type":31},[],376310885,[25,26,27,28],"0.16","0.01","0.0095","0.95","在一个医疗诊断测试中,已知某种疾病的患病率为0.01,测试的准确率为95%,即如果一个人患病,测试结果为阳性的概率是95%;如果一个人没有患病,测试结果为阴性的概率也是95%.如果一个人的测试结果为阳性,那么他实际患病的概率是多少","v1",0,{"answer":33,"createTime":5,"id":34,"options":35,"question":40,"source":30,"type":31},[],376310887,[36,37,38,39],"0.341","1","0.5","0","设随机变量U的概率密度函数为\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F9762e9bed0fb2f03e77d5e9f29712ec8.png\">,求U的累积分布函数F(u)在u=0处的值",{"answer":42,"createTime":5,"id":43,"options":44,"question":49,"source":30,"type":31},[],376310888,[45,46,47,48],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F03e62125dff3fa9a165935ace94ddf1e.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F9f1dbdeca02db1e99c087e7de179698e.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fa3b1c9b36a577fd00374a8206cc42a78.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fd81dde6b8b79560cf6110cbdda8eb45d.png\">","已知函数\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F2b46a964b21b824399d91b8ea0cbe844.png\">,求其在\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F04e9599f171a46cb4eda7bd6487ebfc5.png\">处的导数值",{"answer":51,"createTime":5,"id":52,"options":53,"question":58,"source":30,"type":31},[],376310889,[54,55,56,57],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F9d9e6c8f1bd8684fde31588f07c7cb87.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F9cfaf9e081de71d27ad8dd448f785030.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F3c561255e25dfe325f3a691587450db0.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F52d88a820433e3eb2e259ea74006df8c.png\">","设矩阵 \u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F6b9c9645c019df0f551987fe95315369.png\">,\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Ffaf9627a9588771b5a998bed669d5b93.png\">,则AB的结果是?A=(1234)",{"answer":60,"createTime":5,"id":61,"options":62,"question":67,"source":30,"type":31},[],376310890,[63,64,65,66],"2和-3","4和9","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F62ee418d5830b33d5c6a500513865dcb.png\">和\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F33420d9e5260587802d21b40222ea80e.png\">","2和3","矩阵\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fc436890c14a1576d7002c0d5709cc01d.png\">的奇异值是",{"answer":69,"createTime":5,"id":70,"options":71,"question":76,"source":30,"type":31},[],376310891,[72,73,74,75],"0.3456","0.2304","0.07776","0.128","设随机变量X服从参数为n=5,p=0.4的二项分布,则P(X=3)的值为()",{"answer":78,"createTime":5,"id":6,"options":79,"question":19,"source":30,"type":31},[],[8,9,10,11],{"answer":81,"createTime":5,"id":82,"options":83,"question":86,"source":30,"type":31},[],376310893,[38,10,84,85],"0.8","0.6","假设一个事件A发生的概率是0.6,另一个事件B发生的概率是0.5.如果知道A发生的情况下B发生的条件概率是0.8,那么B发生的条件下A发生的条件概率是多少( )",{"answer":88,"createTime":5,"id":89,"options":90,"question":93,"source":30,"type":31},[],376310894,[91,85,9,92],"0.54","0.9","在一次考试中,某班级的学生中有60%的学生平时成绩优秀,40%的学生平时成绩一般.平时成绩优秀的学生通过考试的概率是90%,而平时成绩一般的学生通过考试的概率是50%.如果一个学生通过了考试,那么他平时成绩优秀的概率是多少( )",{"answer":95,"createTime":5,"id":96,"options":97,"question":102,"source":30,"type":31},[],376310895,[98,99,100,101],"有n个线性无关的特征向量","行列式不为零","对称","可逆","若矩阵 AA 与对角矩阵相似,则 AA 必须满足"]