• 2022-06-07 问题

    求函数[tex=5.286x1.571]2uwizlqRk941FwzAGBx7nXlE6mvuwo0gCPhPTcp6mVQ=[/tex]的微分.

    求函数[tex=5.286x1.571]2uwizlqRk941FwzAGBx7nXlE6mvuwo0gCPhPTcp6mVQ=[/tex]的微分.

  • 2022-05-29 问题

    设线性代数方程组为[tex=12.643x2.786]jcCMHflCR8OS9TosV6N5vM03pqCjf2Gd7o+BsjAzZZ7pq88Ynq1xuWQMJh+W5lls905nUSJ9OhkiQvBgexKsM1yICuIDS7rqv3X865fS1voHAT1dMxAxIrE+pBR9tJ3iCMv0o0Dl5RthDsbvvF4jv1rcRH0T2lrIro3Qccks3HuDrZ9JenkAq443Z/laCqsZ1V4JSXUgQWgeVJLhM4yMlw==[/tex]。(1)试用最速下降法求解(取初始向量[tex=5.286x1.571]r2QqQZKVDz0ZzDs0ttTtv4p0yW+OLet32IShCk035gs=[/tex],计算到[tex=1.857x1.286]uWWnQxg2urghXsooz8qyNg==[/tex]);(2)试用共轭梯度法求解(取初始向量[tex=5.286x1.571]r2QqQZKVDz0ZzDs0ttTtv4p0yW+OLet32IShCk035gs=[/tex])。[br][/br]

    设线性代数方程组为[tex=12.643x2.786]jcCMHflCR8OS9TosV6N5vM03pqCjf2Gd7o+BsjAzZZ7pq88Ynq1xuWQMJh+W5lls905nUSJ9OhkiQvBgexKsM1yICuIDS7rqv3X865fS1voHAT1dMxAxIrE+pBR9tJ3iCMv0o0Dl5RthDsbvvF4jv1rcRH0T2lrIro3Qccks3HuDrZ9JenkAq443Z/laCqsZ1V4JSXUgQWgeVJLhM4yMlw==[/tex]。(1)试用最速下降法求解(取初始向量[tex=5.286x1.571]r2QqQZKVDz0ZzDs0ttTtv4p0yW+OLet32IShCk035gs=[/tex],计算到[tex=1.857x1.286]uWWnQxg2urghXsooz8qyNg==[/tex]);(2)试用共轭梯度法求解(取初始向量[tex=5.286x1.571]r2QqQZKVDz0ZzDs0ttTtv4p0yW+OLet32IShCk035gs=[/tex])。[br][/br]

  • 2022-06-05 问题

    用价键理论说明配离子[tex=5.929x1.571]Aj+M3UxecVWwdCgqeSjTLt1oAwmXXpp6YuXnCIt/llfM7PT0usakCmr5K/ghjGyp[/tex]和[tex=5.286x1.571]TluC/PH53nzgdmPNzrP7ygMZGgX6z/e+zs9ipLnvUG3gYJxD4DcbZPQ99UrVPv4D[/tex]的类型和磁性。

    用价键理论说明配离子[tex=5.929x1.571]Aj+M3UxecVWwdCgqeSjTLt1oAwmXXpp6YuXnCIt/llfM7PT0usakCmr5K/ghjGyp[/tex]和[tex=5.286x1.571]TluC/PH53nzgdmPNzrP7ygMZGgX6z/e+zs9ipLnvUG3gYJxD4DcbZPQ99UrVPv4D[/tex]的类型和磁性。

  • 2022-06-09 问题

    某型号电子元件寿命(单位: h) 服从分布  [tex=5.286x1.571]9O9XVzcBWJkyAstxE/t8MYOte7bvRnaMy8diqRWdrt8=[/tex],  随机抽四件,求其中没有一件寿命小于 180h 的概率.

    某型号电子元件寿命(单位: h) 服从分布  [tex=5.286x1.571]9O9XVzcBWJkyAstxE/t8MYOte7bvRnaMy8diqRWdrt8=[/tex],  随机抽四件,求其中没有一件寿命小于 180h 的概率.

  • 2022-11-04 问题

    写出下列各种配离子的分步生成反应和总的生成反应方程式,以及相应的稳定常数表达式:[tex=5.286x1.571]8hlel4X0qXhXAbm0EA8uCPq0NIVL+gsYhKSY8ZIfYmzITSFvoDNwMw3zKVR4jk8Q[/tex]

    写出下列各种配离子的分步生成反应和总的生成反应方程式,以及相应的稳定常数表达式:[tex=5.286x1.571]8hlel4X0qXhXAbm0EA8uCPq0NIVL+gsYhKSY8ZIfYmzITSFvoDNwMw3zKVR4jk8Q[/tex]

  • 2022-11-04 问题

     设 [tex=2.786x1.357]g1Wo3ALRzTk0js5m9GO2sA==[/tex] 为可微函数, [tex=3.0x1.357]wiwGc5nPSdS4rz0XoAmPNg==[/tex] 为连续可微函数,且 [tex=5.286x1.571]DICX6lFpUORNZd06hi5TIkGamM8yH+kBZKmhFWwBKl2mnC0kM30Hm0WnrHgwpXMF[/tex] 已知 [tex=3.0x1.357]EZ1YLh+FMEcQAjNnWDBjTOIsNztTlNE8eiBgVShrvuw=[/tex]是 [tex=2.786x1.357]g1Wo3ALRzTk0js5m9GO2sA==[/tex] 在约束条件 [tex=4.286x1.357]BcmFgQAZ61k11nppwB37IKXOmeQcWMn7AEgjHoAR3GY=[/tex] 下的一个极值点,下列选项正确的是 未知类型:{'options': ['若 [tex=5.714x1.429]OPITR2TAcuJw0MEgHL2uJ44dLk7XFlVvsR025A12utyKkAflf7hTXu1VBnskLISV[/tex]则 [tex=5.286x1.571]Wb3ePhRrEZao4hOaXmRaaPERNi8dQg4qrgUJ7oRIJ1Dt5IHv/mQLMSrp1rm7172F[/tex]', '若[tex=5.714x1.429]deyETbX4eM0PwFBR/PsgR3IlrGOX0kZdn4tL9e7krKeXobMr9tEzbkdZr5pSHrRv[/tex]则 [tex=5.857x1.571]Wb3ePhRrEZao4hOaXmRaaPERNi8dQg4qrgUJ7oRIJ1Dh/PgRmg85CW/8l9LgUtABofSESsVJZxKAUjao+J46nQ==[/tex]', '若 [tex=6.143x1.429]k5weWvhPtr/rc567JmOhZSp0/FEncxJKKGjXfuX9b+chtgFv3bCGkEZD5+bEIkSR[/tex]则 [tex=5.286x1.571]Wb3ePhRrEZao4hOaXmRaaPERNi8dQg4qrgUJ7oRIJ1Dt5IHv/mQLMSrp1rm7172F[/tex]', '若 [tex=6.143x1.429]D+PbKm9AKreS+Q/Va7AvjaV1eUNOojwAXZHLw+hrVOb5RJ9Ax37OEaz0MtD+Mne4NoqALHVRuaGevZGsk7RdKw==[/tex]则 [tex=5.857x1.571]Wb3ePhRrEZao4hOaXmRaaPERNi8dQg4qrgUJ7oRIJ1Dh/PgRmg85CW/8l9LgUtABofSESsVJZxKAUjao+J46nQ==[/tex]'], 'type': 102}

     设 [tex=2.786x1.357]g1Wo3ALRzTk0js5m9GO2sA==[/tex] 为可微函数, [tex=3.0x1.357]wiwGc5nPSdS4rz0XoAmPNg==[/tex] 为连续可微函数,且 [tex=5.286x1.571]DICX6lFpUORNZd06hi5TIkGamM8yH+kBZKmhFWwBKl2mnC0kM30Hm0WnrHgwpXMF[/tex] 已知 [tex=3.0x1.357]EZ1YLh+FMEcQAjNnWDBjTOIsNztTlNE8eiBgVShrvuw=[/tex]是 [tex=2.786x1.357]g1Wo3ALRzTk0js5m9GO2sA==[/tex] 在约束条件 [tex=4.286x1.357]BcmFgQAZ61k11nppwB37IKXOmeQcWMn7AEgjHoAR3GY=[/tex] 下的一个极值点,下列选项正确的是 未知类型:{'options': ['若 [tex=5.714x1.429]OPITR2TAcuJw0MEgHL2uJ44dLk7XFlVvsR025A12utyKkAflf7hTXu1VBnskLISV[/tex]则 [tex=5.286x1.571]Wb3ePhRrEZao4hOaXmRaaPERNi8dQg4qrgUJ7oRIJ1Dt5IHv/mQLMSrp1rm7172F[/tex]', '若[tex=5.714x1.429]deyETbX4eM0PwFBR/PsgR3IlrGOX0kZdn4tL9e7krKeXobMr9tEzbkdZr5pSHrRv[/tex]则 [tex=5.857x1.571]Wb3ePhRrEZao4hOaXmRaaPERNi8dQg4qrgUJ7oRIJ1Dh/PgRmg85CW/8l9LgUtABofSESsVJZxKAUjao+J46nQ==[/tex]', '若 [tex=6.143x1.429]k5weWvhPtr/rc567JmOhZSp0/FEncxJKKGjXfuX9b+chtgFv3bCGkEZD5+bEIkSR[/tex]则 [tex=5.286x1.571]Wb3ePhRrEZao4hOaXmRaaPERNi8dQg4qrgUJ7oRIJ1Dt5IHv/mQLMSrp1rm7172F[/tex]', '若 [tex=6.143x1.429]D+PbKm9AKreS+Q/Va7AvjaV1eUNOojwAXZHLw+hrVOb5RJ9Ax37OEaz0MtD+Mne4NoqALHVRuaGevZGsk7RdKw==[/tex]则 [tex=5.857x1.571]Wb3ePhRrEZao4hOaXmRaaPERNi8dQg4qrgUJ7oRIJ1Dh/PgRmg85CW/8l9LgUtABofSESsVJZxKAUjao+J46nQ==[/tex]'], 'type': 102}

  • 2022-11-03 问题

    下列配离子中,属四面体构型的是 未知类型:{'options': ['[tex=6.143x1.571]fnVvaNDvq5TSeLyMO/zD9uewNTWgILKhkfGmMrKgwWuDKz3as63OjOPWgXbaradr1Im5RQxIbTgZJeFaCkdhfQ==[/tex]', '[tex=5.286x1.571]FjCR96GegcRfXlT4FSGqwC633cLdaWC4fc8c5x4VTNa4QoqqAnS8iKPpHv9R90gc[/tex]', '[tex=5.5x1.571]qwLFrw/yS5WadYFkYMn6pozgKlHXU4tUrBKzagXzo6WY632BFc+ZXxSSkC/jzAeT[/tex]', '[tex=3.0x1.5]83lyah7pgDu89uOPsjIXo+LY+ZVkBxjKcAiVpStLkU8=[/tex]'], 'type': 102}

    下列配离子中,属四面体构型的是 未知类型:{'options': ['[tex=6.143x1.571]fnVvaNDvq5TSeLyMO/zD9uewNTWgILKhkfGmMrKgwWuDKz3as63OjOPWgXbaradr1Im5RQxIbTgZJeFaCkdhfQ==[/tex]', '[tex=5.286x1.571]FjCR96GegcRfXlT4FSGqwC633cLdaWC4fc8c5x4VTNa4QoqqAnS8iKPpHv9R90gc[/tex]', '[tex=5.5x1.571]qwLFrw/yS5WadYFkYMn6pozgKlHXU4tUrBKzagXzo6WY632BFc+ZXxSSkC/jzAeT[/tex]', '[tex=3.0x1.5]83lyah7pgDu89uOPsjIXo+LY+ZVkBxjKcAiVpStLkU8=[/tex]'], 'type': 102}

  • 2022-06-09 问题

    试以[tex=5.286x1.571]r2QqQZKVDz0ZzDs0ttTtv4p0yW+OLet32IShCk035gs=[/tex]为初值点,使用最速下降法(迭代4次)求解无约束极致问题。[tex=14.429x1.5]zRzuPLqeg2rSmuZNuOMw2Y/4TZSL/If7L3kqEIKWn0khoG64+2Yg6IDFLrtdTZk62HYyOMgYkW9shdDQG4JKLg==[/tex]并绘图表示使用上述各方法的寻优过程。

    试以[tex=5.286x1.571]r2QqQZKVDz0ZzDs0ttTtv4p0yW+OLet32IShCk035gs=[/tex]为初值点,使用最速下降法(迭代4次)求解无约束极致问题。[tex=14.429x1.5]zRzuPLqeg2rSmuZNuOMw2Y/4TZSL/If7L3kqEIKWn0khoG64+2Yg6IDFLrtdTZk62HYyOMgYkW9shdDQG4JKLg==[/tex]并绘图表示使用上述各方法的寻优过程。

  • 2022-07-02 问题

    下列配合物属于内轨型配离子的是 未知类型:{'options': ['[tex=5.071x1.5]0PRTGli0ELQAYnjJW2WrFZ2dkqI42dHi92V4o00I1jJBGIUPXnna+GmrD7N0jhM6[/tex]', '[tex=3.643x1.571]3lOKh8RJSIO7Yn84eCxRLaL6FWVbHcGMHwRkytPnyc0=[/tex]', '[tex=5.286x1.571]SEL3CypVDvr5HffPx60ZBlfzitkhDFtaoqk8tee7Fofw2ufHetid7djEj2uoEInc[/tex]', '[tex=5.643x1.5]fnVvaNDvq5TSeLyMO/zD9qqtHMIfmEOjxxFi3rwTcFD22EqAsXZQvo2JUiQigNyu1oFx5uKaOx7A7lnm4vkYvA==[/tex]'], 'type': 102}

    下列配合物属于内轨型配离子的是 未知类型:{'options': ['[tex=5.071x1.5]0PRTGli0ELQAYnjJW2WrFZ2dkqI42dHi92V4o00I1jJBGIUPXnna+GmrD7N0jhM6[/tex]', '[tex=3.643x1.571]3lOKh8RJSIO7Yn84eCxRLaL6FWVbHcGMHwRkytPnyc0=[/tex]', '[tex=5.286x1.571]SEL3CypVDvr5HffPx60ZBlfzitkhDFtaoqk8tee7Fofw2ufHetid7djEj2uoEInc[/tex]', '[tex=5.643x1.5]fnVvaNDvq5TSeLyMO/zD9qqtHMIfmEOjxxFi3rwTcFD22EqAsXZQvo2JUiQigNyu1oFx5uKaOx7A7lnm4vkYvA==[/tex]'], 'type': 102}

  • 2022-06-16 问题

    设电源电压X服从正态分布 [tex=5.286x1.571]0g3WSbwvmgocRhkvbQow5AE3z+YvuV4tUFEhGj5y/fQ=[/tex] ,某电子元件当电压低于200V时损坏的概率为0.1;当电压在200V~240Ⅴ时损坏的概率为0.001;当电压高于240V时损坏的概率为0.2,求:(1)该电子元件损坏的概率.(2)该电子元件损坏时,电源电压在200V~240V的概率.

    设电源电压X服从正态分布 [tex=5.286x1.571]0g3WSbwvmgocRhkvbQow5AE3z+YvuV4tUFEhGj5y/fQ=[/tex] ,某电子元件当电压低于200V时损坏的概率为0.1;当电压在200V~240Ⅴ时损坏的概率为0.001;当电压高于240V时损坏的概率为0.2,求:(1)该电子元件损坏的概率.(2)该电子元件损坏时,电源电压在200V~240V的概率.

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