[tex=12.143x1.286]2OmrcLfQclOWbgesR/GiOI9Z2bFPiMmzxg0HHw+dcCehRWXcCv4JMCSN2/R9KppV[/tex][tex=15.643x1.286]QcDDmlB9X1VT2fDMBOSI7cOdRAyz8fgutT6exaSjG8H+F4cxJmw8WpmzPN0Po3i241UqOJ7zzP2otnO2mHjwGw==[/tex]

求向量场[tex=0.786x1.286]pi/GsQ3apuRt43V3XQq/tA==[/tex]的旋度：[tex=15.643x1.286]zG4P5+RhYZcnyvoENOL7Mi2nSWv7I1TOIQRtzixEndCmNyn2Tdifmz0P4JuzErSn[/tex].

已知序列的 DFT 结果如下, 求其原序列。[tex=15.643x1.286]2JVDI/jRwR0oZ8r1uxqIy72ILFdPOu5U4lhe4jTptK396t/7lbio4WDVFaJvwdl+[/tex][br][/br]

下列选项为某变速器一、二、三、四挡的传动比，则三挡的传动比为（）。 A: 0.969 B: 1.286 C: 1.944 D: 3.455

[tex=6.786x1.286]XdLBAeZm6qCb6JorIqrb2xTnDyafWKL/4sad/N96mng=[/tex][tex=9.714x4.5]fnpmC2J6JmQBLyo5NmGAz1E9xXCYI2+x9gIu5at9ZMOE6O/62+uI/ODHI/Uwdf9YG4MxKsxwaQKaadISXzzM0248UKCqtMAD8pba0k8IRHL9FCIj6eWyR9tTlWDlAiNQZantzG3qXEzO2zugMj2J7g==[/tex][tex=38.143x1.286]RUX89cCoiZJRoR/C3erO7/bTUf3gigQfldHdW2smJjPCZedprJJFr4ixm9wHeevA482r4GOm/yIqPFdcDYSqDhtBzh3lbmWP8KbJ6m4s9M0rQtw4xzSbh6bZ97w0Hfm/m+30FFJSBtJgwQtTHWBlr7EclbXfOp56H9SYL74JS9+RNuhu84JfO5Luc26hTfm4wT1VNoFEQlSZWD82HXwqHA==[/tex][tex=15.643x1.286]1HYJsTkFBocAQiPWvG6nlaeS6mcMOl38HDD7swjm1v/vvtg0OnZuYEUH8gnD+nlwcudIJ48tMzfWnLh0KlJwJg==[/tex]

设随机变量[tex=2.786x1.286]AG5D6gU/evQZlfwisXgzYw==[/tex]的分布律如表4-6所示.[img=772x211]1796bbd7fee3d72.png[/img]求  [tex=15.643x1.286]156WGNHktx+w/A2sEBZaybPF/lxp3vj9U0yzeUxnPp/N+yO9h/XWGI50PotkugxvtAUsz5M1UyZaEQ21LkOfLA==[/tex]. 

[tex=6.786x1.286]XdLBAeZm6qCb6JorIqrb2xTnDyafWKL/4sad/N96mng=[/tex][tex=9.714x4.5]fnpmC2J6JmQBLyo5NmGAz1E9xXCYI2+x9gIu5at9ZMOE6O/62+uI/ODHI/Uwdf9YG4MxKsxwaQKaadISXzzM0248UKCqtMAD8pba0k8IRHL9FCIj6eWyR9tTlWDlAiNQZantzG3qXEzO2zugMj2J7g==[/tex][tex=38.143x1.286]RUX89cCoiZJRoR/C3erO7/bTUf3gigQfldHdW2smJjPCZedprJJFr4ixm9wHeevA482r4GOm/yIqPFdcDYSqDhtBzh3lbmWP8KbJ6m4s9M0rQtw4xzSbh6bZ97w0Hfm/m+30FFJSBtJgwQtTHWBlr7EclbXfOp56H9SYL74JS9+RNuhu84JfO5Luc26hTfm4wT1VNoFEQlSZWD82HXwqHA==[/tex][tex=15.643x1.286]1HYJsTkFBocAQiPWvG6nlaeS6mcMOl38HDD7swjm1v/vvtg0OnZuYEUH8gnD+nlwcudIJ48tMzfWnLh0KlJwJg==[/tex]

[tex=6.786x1.286]XdLBAeZm6qCb6JorIqrb2xTnDyafWKL/4sad/N96mng=[/tex][tex=9.714x4.5]fnpmC2J6JmQBLyo5NmGAz1E9xXCYI2+x9gIu5at9ZMOE6O/62+uI/ODHI/Uwdf9YG4MxKsxwaQKaadISXzzM0248UKCqtMAD8pba0k8IRHL9FCIj6eWyR9tTlWDlAiNQZantzG3qXEzO2zugMj2J7g==[/tex][tex=38.143x1.286]RUX89cCoiZJRoR/C3erO7/bTUf3gigQfldHdW2smJjPCZedprJJFr4ixm9wHeevA482r4GOm/yIqPFdcDYSqDhtBzh3lbmWP8KbJ6m4s9M0rQtw4xzSbh6bZ97w0Hfm/m+30FFJSBtJgwQtTHWBlr7EclbXfOp56H9SYL74JS9+RNuhu84JfO5Luc26hTfm4wT1VNoFEQlSZWD82HXwqHA==[/tex][tex=15.643x1.286]1HYJsTkFBocAQiPWvG6nlaeS6mcMOl38HDD7swjm1v/vvtg0OnZuYEUH8gnD+nlwcudIJ48tMzfWnLh0KlJwJg==[/tex]

假定成本函数[tex=2.286x1.286]f2U2rG0/Djj9G4d3ELEY9g==[/tex]与收益函数[tex=2.286x1.286]g60r0eJTSnXWiwY5qtUUYw==[/tex]分别表示为：[tex=15.643x1.286]PgBeMT0VsA/kLMr01aEbjhjVqLYfhCGvxecp4CqJL8PnEcqATONHBVD0yzdK6iXg[/tex]，[tex=7.571x1.286]Sumc3EzUEJzyf1azMHVT0yLDVYxIG/rHHdzHV56+490=[/tex]求利润最大化的产量。

[tex=1.714x1.286]wCQ+3vMgVapsYMSa5gL1Wg==[/tex]三体综合征标准型 未知类型：{'options': ['[tex=12.714x1.286]Wh3OW+57c51Tl46S23+Md5TSIq6SmfPEbD05EQh/tozH+5OkS02uS+6I1IH7uPoE[/tex]', '[tex=6.714x1.286]YNRarh1AdLqhIw3P/juNZXveIhP7v06qaK4zU2VMmJc=[/tex]', '[tex=12.714x1.286]GT5hrfYkOpQXfZmMPzZYEjpYk5JWer2X5g2EeLxvEu0myBZJdy0yg6mJEke/OfqG[/tex]', '[tex=15.643x1.286]N6VtZKgecpvjF4ra9LVSIBQYYIdRcuPLBStBVCj0aceEd8oD70SLKRJRvLWIA0D8[/tex]', '[tex=10.929x1.286]sd9gmPnRFYnHvEZ5saj+PeP4pw4QMh2ao5Ek91dMwRQ=[/tex]'], 'type': 102}