设[tex=4.5x1.357]b4CLct61E2aWP3Wn8DcsXw==[/tex]，[tex=3.071x1.214]fdUmbtzE7SEfYHjD4QrAiA==[/tex]，求[tex=1.214x1.0]tDNj5aoJETJiravoifVs8Q==[/tex] .

2022-05-29

设[tex=4.5x1.357]b4CLct61E2aWP3Wn8DcsXw==[/tex]，[tex=3.071x1.214]fdUmbtzE7SEfYHjD4QrAiA==[/tex]，求[tex=1.214x1.0]tDNj5aoJETJiravoifVs8Q==[/tex] .

答案：

[b]解一[/b]    [tex=3.857x1.214]mGhJZ6E892iPCUHO2xtDXw==[/tex][tex=9.5x3.5]075gCzZzsMRb6HYXYk9X9xaIzHO3duphZRd+g1rZUuQw5s47z3gKN1L1z4Y0pNb801IH4+X7TLBc50ZoqJmbtQo+dXZbmg81Ex+6Wjlxfs8TPT+XNvUzuF+fSh0JSyZm40HtixVPcwWSoWV+UEWAcQ==[/tex][tex=6.143x3.5]075gCzZzsMRb6HYXYk9X9x+sFUF7ts5JDc+UK5o3q5CDenGCnYSvjBcIlk71HLTco10s4opiR6x3th2WbOUIAZ6kIojaTLV9nlTowYh1We96a1LPRND8ODIzj4O72gP0[/tex]，[tex=15.429x3.5]Jof/THmGXOoQg8X/23r4fOEqxEUIgZuXrTW7hA8Bj4P8b3hjrQB0TGJW1K2mawFF75EvpqPP1L9hAtxt8AKRupUTtwZG8ZBXXznF884YxnEUAuNTI5onwmLMJ7EuXjAdOJ70B6+a2BYdrUMp6ftGfp/Fq/ig03Xw46M3YZJ7ygIIKnP1UGw481Arcl4ViPItnLxucLnQ2NP7SwDdePSStqt0mnArzsb+U5MGcO82RCE=[/tex][tex=9.071x3.5]075gCzZzsMRb6HYXYk9X99zZtszoQjllaDEtfU8B3qaTvZoivwKnmeT345tJNpveCxrCgV+IY4k9aV7olxV6iICgJhvox33piKKVigOdPWRba3lOwcjDAVtkLFrkgOih[/tex][tex=10.0x3.5]mTKQlR0FHUlEbOr7GbOlEMl6bQ9mkd6WTOJ0mDt2NwealWC2hSkUvR9/g/2sJnUY5fgG4DCMxsZP9JZn7wLTcXpcqz6GY33YKfYXDYlpVDMhiJ7w7XpD3qSEiykHEuU/[/tex]，[tex=4.643x1.214]XFH9eJQzxvyQ38FqjQ8w9A==[/tex][tex=9.143x1.5]pW7WQW5ozPxsXYEhDKdsKZUuOuUdjN3NWKpsBruodIg=[/tex]，[tex=1.286x0.786]lRSLJav0cvc1uYdx/9plcw==[/tex]，[tex=5.929x1.214]5Uz7RsvosqQ7N/SjvApSuDEvGpzGaamqoFM4Y3nIzaw=[/tex][tex=8.643x3.5]Q9b66N2sNwPom8ONyzJImGuBgmdYdP37zGxmJHc6MtBVboJ6laSOb/1TOG4aB9YlcT1y6Zm/aO5wvpbCk89X3wUBOVD/Ol71+1wSebzl5sU5Mqu4tQvzKAZ11qKE6KjQ[/tex] .[b]解二[/b]    [tex=3.857x1.214]lAXleNBkbZ6bpkCn7rdnAg==[/tex][tex=9.5x3.5]075gCzZzsMRb6HYXYk9X9xaIzHO3duphZRd+g1rZUuQw5s47z3gKN1L1z4Y0pNb801IH4+X7TLBc50ZoqJmbtQo+dXZbmg81Ex+6Wjlxfs8TPT+XNvUzuF+fSh0JSyZm40HtixVPcwWSoWV+UEWAcQ==[/tex][tex=6.143x3.5]075gCzZzsMRb6HYXYk9X9x+sFUF7ts5JDc+UK5o3q5CDenGCnYSvjBcIlk71HLTco10s4opiR6x3th2WbOUIAZ6kIojaTLV9nlTowYh1We96a1LPRND8ODIzj4O72gP0[/tex]，[tex=8.071x1.571]FiDtWCfN8G4jgMqBqqURp8ssLBfEyYkYhDIlQwgesnt/YTYDyaogi8xmXlPoXoYbD4GPc4s9ZGAtleEBsQ9X9w==[/tex] [tex=9.143x1.571]8e+LT4mDelnUoAEYFzNGT3Axn8d0P9yhB2+3ufSfdpwMUl1L8NOuTK5dh6/mDRvHcSPf1SHmzjfLXhURrqvZFA==[/tex][tex=5.071x1.214]J0H2nnAAnt2sgcKpB5oax1jtBmd164Zv+Ecu50ooKcQ=[/tex]，[tex=4.643x1.214]XFH9eJQzxvyQ38FqjQ8w9A==[/tex][tex=7.0x1.5]pW7WQW5ozPxsXYEhDKdsKV+geDp8TDOKg1CobwqP7uI=[/tex][tex=2.143x1.214]H2eot44/aq2tKXyLH577pA==[/tex]，[tex=2.786x0.786]HB2FCxmVDzmoUYwXL6D5vziyeo5PYyW6UtAGvlf3TKo=[/tex]，[tex=5.929x1.214]5Uz7RsvosqQ7N/SjvApSuDEvGpzGaamqoFM4Y3nIzaw=[/tex][tex=8.643x3.5]Q9b66N2sNwPom8ONyzJImGuBgmdYdP37zGxmJHc6MtBVboJ6laSOb/1TOG4aB9YlcT1y6Zm/aO5wvpbCk89X3wUBOVD/Ol71+1wSebzl5sU5Mqu4tQvzKAZ11qKE6KjQ[/tex] .

举一反三

内容

0
设[tex=3.071x1.214]MBM6FkRKhubflZJqDSdnSQ==[/tex], 求[tex=1.0x1.357]rjzw0bBUODiY66l+Mq83xDvCIhYz9DqYe2O7d9F77+o=[/tex]
1
设随机变量(X,Y)的概率分布列为[img=345x154]178ab1c9ce3bc1b.png[/img]求[tex=1.571x1.0]JUrGU6ftUjxQCIr6CyfDwQ==[/tex],[tex=1.357x1.0]yL/7/hhyqgwzAX8jnIq3OQ==[/tex],[tex=4.357x1.357]LN0xwhQHSOeLwBClUlpHQw==[/tex].
2
灰锡为金刚石型结构,晶胞中包含 8 个[tex=1.214x1.0]RYRrnEZuzxG0PzfMxQIg/g==[/tex]原子,晶胞参数[tex=5.0x1.214]f69Z+4Rb+msOpZfBYn0ajg==[/tex].(1) 写出晶胞中 8 个[tex=1.214x1.0]ZDeNWlVOEhK0o5kHVi+K5A==[/tex]原子的分数坐标;(2) 计算[tex=1.214x1.0]ZDeNWlVOEhK0o5kHVi+K5A==[/tex]的原子半径;(3) 灰锡的密度为[tex=4.5x1.429]zc077NcCDMJpPzRqeXFYYq/wgk+7MQlWtY81NIPbXyM=[/tex],求[tex=1.214x1.0]ZDeNWlVOEhK0o5kHVi+K5A==[/tex]的相对原子质量;(4) 白锡属四方晶系,[tex=5.0x1.214]dKzqq4E34D5DsQ3McTVedQ==[/tex],[tex=4.929x1.214]QNF/4XRuJ2OYYEced+G82w==[/tex], 晶胞中含 4 个[tex=1.214x1.0]RYRrnEZuzxG0PzfMxQIg/g==[/tex]原子.通过计算说明由白锡转变为灰锡,体积是膨胀了还是收缩了.(5) 白锡中[tex=3.214x1.143]OBpKyTfD6ce4tKz1YjVUUg==[/tex]间最短距离为[tex=3.714x1.214]v6scHcabwMhaOakEbbLLxQ==[/tex],试对比灰锡数据,估计哪一种锡的配位数高?
3
设随机变量X,Y的概率分布：[img=185x122]179421429b788f8.jpg[/img]且事件[tex=3.143x1.357]HAqUfwAGQ9R86ez4KojAnQ==[/tex]与[tex=4.5x1.357]S1a0vMgN0BwAgdMXyzD5Tni3Z0Jn51Y4E9X2cy+H8uY=[/tex]相互独立，求常数a,b.
4
若x为自变量t,求[tex=1.5x1.429]5W5tOYbJ+LlsRP2dMsi4byxwtjvvL/3u7NEzPV5PWp0=[/tex],设:[tex=2.571x1.214]Sv9aCsCkfQ4wl+tpfaNV0Q==[/tex]