已知[tex=4.786x1.286]tPjXxzgONS63BQnlqH1OMG88XRRryzx9+WPIGFB+heA=[/tex]，[tex=4.786x1.286]5m47jxjmneHKjqlaEPowDI6lP1DXfpqaxOpDaUDodrE=[/tex]，[tex=4.857x1.286]+zcjron+K3ol6QkDcAmG8Q==[/tex]，求[tex=3.143x1.286]Nw7VritSGjTutlypeoKQJg==[/tex]的值。

2022-06-17

已知[tex=4.786x1.286]tPjXxzgONS63BQnlqH1OMG88XRRryzx9+WPIGFB+heA=[/tex]，[tex=4.786x1.286]5m47jxjmneHKjqlaEPowDI6lP1DXfpqaxOpDaUDodrE=[/tex]，[tex=4.857x1.286]+zcjron+K3ol6QkDcAmG8Q==[/tex]，求[tex=3.143x1.286]Nw7VritSGjTutlypeoKQJg==[/tex]的值。

答案：

解  令[tex=3.929x1.286]lQ08YLg9iCw4Wm53T2PDpA==[/tex]，[tex=3.929x1.286]Sd0muaRzkeDSfFDN8R8j2Q==[/tex]，[tex=3.857x1.286]SdqW/eaqvd3Ax+PCldHvWQ==[/tex]，[tex=4.071x1.286]HiJybfLKImGQoSc1ENC+wA==[/tex]，[tex=5.786x1.286]nYKzyI0QDo5k9nwqQZknvFVu6bEAFTtKkw0+lI0QrmY=[/tex]，则[tex=22.357x1.286]rGViXeGsEL6nJayZw30FMwnLfuiBUDlz5dyHiZJvDhl0KyOqvgWQAdMtNn4r3BgSQKGolVBILh7TjRWP2bX+fA==[/tex][tex=6.0x1.786]BE+VkBJvbdbYYdo+SsWmMCEgxBsmNHeGqnegFXc5TF5qgWiRYmOxagk35MLBpqjp[/tex]，或[tex=5.286x2.0]CCyjcs1OXBJoV+jcxLefZhBndnW6gzKP7Av6B9RFABw=[/tex][tex=6.857x1.286]Bl0O+rWIQXsbXEJv5EYbclH5w6m4l9vSvyY86B2JFaY=[/tex]，[tex=6.571x1.286]EtOwvkq8RboJ+xHRvD3ov5Nvrjf2CT6gMjiEDRbhVfA=[/tex]或[tex=6.571x1.286]P0SUOqWiGtiDYmJdIy36KNjZQRUA+NPAc8EwmmgdQhg=[/tex]，[tex=5.643x1.286]WBQaF1FxNhDwJhBSOA7ej/yBpuZ4n330QBiBT5dCJoM=[/tex][br][/br][tex=15.714x1.286]3K130fsMzqaz0dLG/ojYkpkwfJN/WslLIRwsUp3zLeyHQS/s0PPOk4qiwILyF/QThP+pNgYo1RB5swjeAxoNgw==[/tex][tex=13.214x1.286]RAhv44YqJpcTLhPJtxZ+ZfXMwG/pEJ2mFkrAMizikNUXQwhSU/0UAkDmLcguS67z[/tex]或[tex=14.5x1.286]z2rXycbF931c4N5zkcqZ4iKnidhcOFDyQzfbTkNCmJLncpI2eT8Xh+P/j+9BTzGh[/tex][tex=14.143x1.286]ZumvME/6Y8DKrL/LSowN3ELjjZnPUjBaVy98nH9KJYW7jbN/vqBJytYHrGBtE4oq[/tex]。所以[tex=4.857x1.286]A5U4nzAQ2i0aIpsXhI96DQ==[/tex]。[br][/br]

举一反三

内容

0
二次型[tex=4.786x1.286]aNUjFH4c8MuKgO93VZV7r7NDpt8Ha6OvutwowPiGT8Y=[/tex][tex=3.143x1.286]7bLaAVP3tuGNm9yOVn/tbg==[/tex][tex=6.929x3.643]075gCzZzsMRb6HYXYk9X9yHwaz0YR0KutWTHH5uI+mVmev3JjQcHLTElMIPEqdQAYC38WZ7uwd+ZxpahMABcL1Fl3Vo18zjQ6GJRrt9/ilmMatMQ6R9V3Bo9kGqImhGd[/tex][tex=3.214x3.357]075gCzZzsMRb6HYXYk9X96r0kWKSapX3uFTiObPnpwgbpgDJjGmwyFhEy1SS/CpG8oYQw6G2OpS41VjioasLOQ==[/tex]的矩阵是[input=type:blank,size:6][/input] .
1
在如图所示电路中，已知晶体三极管特性相同，[tex=3.357x1.286]CobLMF0aG+fc1FDzIrTVgA==[/tex]，[tex=6.643x1.286]krrTuFZnRtkthqHfBIvVUA98K1Hmd3v+I27NxSaC2no=[/tex]，要求[tex=6.214x1.286]ixaO+q5fIHKdq81qH6WgE1k3EEFrzWsxNQ1gjne5f+w=[/tex]，[tex=5.429x1.286]KShrh6zYUgVqSTNfdy0TFKq2EHXy1PLcR+VnmK9h3po=[/tex]，[tex=6.143x1.286]lWMPzFaw8PAH4wscm18FB3XBzY3rZHMPo27jns1MNd8=[/tex]，[tex=5.357x1.286]18F2yg+wM1QfDLxQSzj9nkaGcM04bsnyYlxEqmcgVIQ=[/tex]．设[tex=4.857x1.286]BpOwv4a5R28b3mUPi2uLY1uO/K0ryeD+FdGUqhSq4mw=[/tex]，[tex=4.786x1.286]1QWvQMtb/30dw2C/qjNCiKN8TI0Cr1YNAU+DvUoreb0=[/tex]，[tex=4.786x1.286]+jsCXu+8VKRz3rIN03J4rGSQ3/yMTwwczO7a7ee8xvE=[/tex]，试计算各电阻值．[img=170x143]179dd02fd50bbe5.png[/img]
2
设总体[tex=0.929x1.286]uswT/CEcOIwMpCvTz/zeaA==[/tex]服从几何分布，分布律为[tex=10.643x1.286]ypaPxhCdRnWTUGQ2NQ+nouX7g1utISzIl/vJ7+9lHIU=[/tex]，[tex=4.786x1.286]rqHEi+D3ZhpR8SQMIJakl0I3UvnOVYytGMfkIIfzioo=[/tex]，[tex=4.786x1.286]pq6RoAxBz+3cvyul8zgx8Q==[/tex]（1）求[tex=0.571x1.286]QPadlhZ3vYN/Hi29gpTrFw==[/tex]的矩估计；（2）求[tex=0.571x1.286]QPadlhZ3vYN/Hi29gpTrFw==[/tex]的极大似然估计。
3
求下列函数的导函数：(1) [tex=8.071x1.286]aqUb4sP4QcLKt86OWgqhUewem2jQYGc1UrAnlpp73EE=[/tex](2)[tex=4.786x1.286]OkH2Z9Ff2DjndTQEgBDpnicV9/A7POK/RTy6CPfwDg0=[/tex]
4
应激时下列何种激素可降低未知类型：{'options': ['[tex=4.857x1.286]+SBVzXtlCDexdMPaYBduijXwaK9WYnCb0xzv+rY2+qg=[/tex]', '[tex=2.929x1.286]sROgYyKBq3zePkPwvv9/Yw==[/tex]', '[tex=2.929x1.286]ZIqX32EPSMkk0A/nwjdMZQ==[/tex]', '[tex=4.857x1.286]kHqgQ5rOQVKe2ydHO0ixOiuiTPbQ9t0vdNAUgqsNpLQ=[/tex]', '[tex=4.786x1.286]Iz9SbdOR4SOhKzX8NI6Zk56r27Vn5G8Py28sR0JFl6A=[/tex]'], 'type': 102}