设[tex=0.571x1.286]mRKL/orzOudCEARA8qn3Kw==[/tex]，[tex=0.5x1.286]PGyKeLDo0qv9T0n29ldi6w==[/tex]为给定实数，试用不等式符号(不用绝对值号)表示下列不等式的解。（3）[tex=4.714x1.571]ozgX2YS/Rwcz60/OB1BM8SmhuiXA0QafMe8Jp5znMoY=[/tex]

2022-07-26

设[tex=0.571x1.286]mRKL/orzOudCEARA8qn3Kw==[/tex]，[tex=0.5x1.286]PGyKeLDo0qv9T0n29ldi6w==[/tex]为给定实数，试用不等式符号(不用绝对值号)表示下列不等式的解。（3）[tex=4.714x1.571]ozgX2YS/Rwcz60/OB1BM8SmhuiXA0QafMe8Jp5znMoY=[/tex]

答案：

由[tex=4.714x1.571]ozgX2YS/Rwcz60/OB1BM8SmhuiXA0QafMe8Jp5znMoY=[/tex]，得[tex=8.714x3.357]fnpmC2J6JmQBLyo5NmGAzxM97mumSrZGZ44hIikAp44iPRzabZa0JfmsuL/ga3XdmbukZrVqYwAwVpwbPkW9U2KPz+BPistEZDJrhaEv9x8=[/tex]即[tex=9.143x2.929]fnpmC2J6JmQBLyo5NmGAzxM97mumSrZGZ44hIikAp46zRDfQ+hlWYx6j4tg8Eqgq7YJukI4bEtgWeNUqv2o1bZjroi1MeCb9njJX1BxHPPg=[/tex]①当[tex=2.357x1.071]QbU+vUJjuGTVI8qNJiB1oA==[/tex]时，[tex=6.143x3.357]fnpmC2J6JmQBLyo5NmGAzzqkOBfPldbxKBlrEmtih0aNCWIBj8Tw/uhdBMuug6F/7NIHuyIFXvN3Wlglb7YWoQ==[/tex]即[tex=11.357x3.357]fnpmC2J6JmQBLyo5NmGAz4B1q/XvrNMeegZX93FYEIsaT0uwGc8mMOUJ1mIOgGmKz86ni2e5i8iYxv/yBwQTjCmOkEpZ7ELOQN/jPZefCW4=[/tex]②当[tex=4.143x1.143]p6J2kw+keGZl8rWQIKJ+IQ==[/tex]时，[tex=6.143x3.357]fnpmC2J6JmQBLyo5NmGAz/PacmX72Z2QUdFIG19RfAYTk7DDx6Sh4I1yeppTZik0CuBbrXV27ooRYWTcr/nFSk3jve+qsWGruMof/oTqUE4=[/tex]即[tex=12.357x3.643]TwPgEmmmC5szroT604LXFEYeCn0oUmEjwLX0t3H4Vj3Gg0UuMQXf7TIiR+qBfVoNmkOQdKwtmgF/eVutklJhQOlEmyGkUeTQl48PTq3TOHACWKMkBUUbHYZS0bHDcA8p[/tex][tex=11.357x1.429]fmYG4ev7h9jXi1KxIxpDQf6Jftc5g0u7mQG/XF8h0Pj3UU+gVbizxuszweplQ58Q[/tex]或[tex=8.5x1.429]jG6BNPTvtHYiccNEPzkcMMNVBQghvlm6pZ9wbvCrs8Q=[/tex]

举一反三

内容

0
设[tex=6.143x1.286]6rwJed1FsHiTTrZfLn+yQSSsHa3ksdJiBdvr4sYtaD8=[/tex]，[tex=6.857x1.286]LmaePXUdmgsHYVP+pRbbkQfC+dsYW3KDGPZRbpTaNwg=[/tex]，试用[tex=0.571x1.286]mRKL/orzOudCEARA8qn3Kw==[/tex]，[tex=0.5x1.286]PGyKeLDo0qv9T0n29ldi6w==[/tex]，[tex=0.5x1.286]m/VGGUpsnKNFGYXigdTc/A==[/tex]表示向量[tex=3.214x1.286]wyo2V090esfyVpXpko/1wQ==[/tex]。
1
设X为连续型随机变量，若[tex=0.571x1.286]mRKL/orzOudCEARA8qn3Kw==[/tex]，[tex=0.5x1.286]PGyKeLDo0qv9T0n29ldi6w==[/tex]皆为常数，则下列等式中不恒成立的是未知类型：{'options': ['[tex=8.929x1.357]PkEtH/pDQZCZQPWDfGJfpCr47ZyeOHOSQxPuBvVouIc=[/tex]', '[tex=5.0x1.357]sqH6r7YQVIMa84hRkVMwwQ==[/tex]', '[tex=6.214x1.286]r7KwjVSQWkObBARrqtRNeUQ5+//3heqTO5xSr2HubXU=[/tex]', '[tex=9.929x1.286]cV51IFAhucjdQSQLt/6a1yYAb13swT9V2+8C+B+bYbY=[/tex]'], 'type': 102}
2
已知：直线[tex=0.571x1.286]mRKL/orzOudCEARA8qn3Kw==[/tex]、[tex=0.5x1.286]PGyKeLDo0qv9T0n29ldi6w==[/tex]、[tex=0.5x1.286]m/VGGUpsnKNFGYXigdTc/A==[/tex]、[tex=0.571x1.286]E8TCNnEPtMKJ0mC2xxh0/Q==[/tex]是两两相交且不过同一点的四条直线，求证：直线[tex=0.571x1.286]mRKL/orzOudCEARA8qn3Kw==[/tex]、[tex=0.5x1.286]PGyKeLDo0qv9T0n29ldi6w==[/tex]、[tex=0.5x1.286]m/VGGUpsnKNFGYXigdTc/A==[/tex]、[tex=0.571x1.286]E8TCNnEPtMKJ0mC2xxh0/Q==[/tex]共面。
3
如果正数[tex=0.571x1.286]mRKL/orzOudCEARA8qn3Kw==[/tex]，[tex=0.5x1.286]PGyKeLDo0qv9T0n29ldi6w==[/tex]，[tex=0.5x1.286]m/VGGUpsnKNFGYXigdTc/A==[/tex]，[tex=0.571x1.286]E8TCNnEPtMKJ0mC2xxh0/Q==[/tex]满足[tex=6.143x1.286]ZmgY4IYKNAnTxjSaOa1RjQ==[/tex]，那么未知类型：{'options': ['[tex=4.429x1.286]LJI1FiqfFfvLk57V4PrnIg==[/tex]，且等号成立时[tex=0.571x1.286]mRKL/orzOudCEARA8qn3Kw==[/tex]，[tex=0.5x1.286]PGyKeLDo0qv9T0n29ldi6w==[/tex]，[tex=0.5x1.286]m/VGGUpsnKNFGYXigdTc/A==[/tex]，[tex=0.571x1.286]E8TCNnEPtMKJ0mC2xxh0/Q==[/tex]的取值唯一', '[tex=4.429x1.286]TX9Qz0sE7bWEvnntsBl/HA==[/tex]，且等号成立时[tex=0.571x1.286]mRKL/orzOudCEARA8qn3Kw==[/tex]，[tex=0.5x1.286]PGyKeLDo0qv9T0n29ldi6w==[/tex]，[tex=0.5x1.286]m/VGGUpsnKNFGYXigdTc/A==[/tex]，[tex=0.571x1.286]E8TCNnEPtMKJ0mC2xxh0/Q==[/tex]的取值唯一', '[tex=4.429x1.286]LJI1FiqfFfvLk57V4PrnIg==[/tex]，且等号成立时[tex=0.571x1.286]mRKL/orzOudCEARA8qn3Kw==[/tex]，[tex=0.5x1.286]PGyKeLDo0qv9T0n29ldi6w==[/tex]，[tex=0.5x1.286]m/VGGUpsnKNFGYXigdTc/A==[/tex]，[tex=0.571x1.286]E8TCNnEPtMKJ0mC2xxh0/Q==[/tex]的取值不唯一', '[tex=4.429x1.286]TX9Qz0sE7bWEvnntsBl/HA==[/tex]，且等号成立时[tex=0.571x1.286]mRKL/orzOudCEARA8qn3Kw==[/tex]，[tex=0.5x1.286]PGyKeLDo0qv9T0n29ldi6w==[/tex]，[tex=0.5x1.286]m/VGGUpsnKNFGYXigdTc/A==[/tex]，[tex=0.571x1.286]E8TCNnEPtMKJ0mC2xxh0/Q==[/tex]的取值不唯一', '以上均不正确'], 'type': 102}
4
设 [tex=2.286x1.286]mOMdkxPf8ug2R09NODY7dA==[/tex]，问 [tex=0.571x1.286]mRKL/orzOudCEARA8qn3Kw==[/tex] 、 [tex=0.5x1.286]PGyKeLDo0qv9T0n29ldi6w==[/tex]取什么值时，积分[tex=6.286x2.857]k8MhqpV1Uo0+CAxNS7N/x9+cRcKF+6wnWRZ1jyGbU6aDMxhoFId1YyW6n7ro8dyLZ6R6oPcyMbFbRM6c6HUNyQ==[/tex]取得最大值?