• 2021-04-14 问题

    若X~N(),且E(X)=5,D(X)=4,则= ,=/ananas/latex/p/310942/ananas/latex/p/200/ananas/latex/p/297

    若X~N(),且E(X)=5,D(X)=4,则= ,=/ananas/latex/p/310942/ananas/latex/p/200/ananas/latex/p/297

  • 2021-04-14 问题

    /ananas/latex/p/515893/ananas/latex/p/515894/ananas/latex/p/503271/ananas/latex/p/515901/ananas/latex/p/515902/ananas/latex/p/515907/ananas/latex/p/515908

    /ananas/latex/p/515893/ananas/latex/p/515894/ananas/latex/p/503271/ananas/latex/p/515901/ananas/latex/p/515902/ananas/latex/p/515907/ananas/latex/p/515908

  • 2021-04-14 问题

    已知()=0.4,则()=( )/ananas/latex/p/152/ananas/latex/p/278/ananas/latex/p/847/ananas/latex/p/281/ananas/latex/p/152/ananas/latex/p/4781/ananas/latex/p/7419/ananas/latex/p/6547

    已知()=0.4,则()=( )/ananas/latex/p/152/ananas/latex/p/278/ananas/latex/p/847/ananas/latex/p/281/ananas/latex/p/152/ananas/latex/p/4781/ananas/latex/p/7419/ananas/latex/p/6547

  • 2021-04-14 问题

    设随机变量X~N(5,),则P(52)=./ananas/latex/p/6071

    设随机变量X~N(5,),则P(52)=./ananas/latex/p/6071

  • 2021-04-14 问题

    A:平面,B:球面,C:旋转椭球面,D:椭球面,E:圆柱面,F:抛物柱面,G:椭圆柱面,H:旋转抛物面,I:圆锥面,J:椭圆锥面,K:马鞍面。则: (1)是____; (2)是______; (3)是______; (4)是______; (5)是______; (6)是______; (7)是______; (8)是______; (9)是______; (10)是______; (11)是______; (12)是______; (13)是______;/ananas/latex/p/1045101/ananas/latex/p/28097/ananas/latex/p/958152/ananas/latex/p/39419/ananas/latex/p/973515/ananas/latex/p/47030/ananas/latex/p/645788/ananas/latex/p/36944/ananas/latex/p/34552/ananas/latex/p/422334/ananas/latex/p/1045357/ananas/latex/p/36098/ananas/latex/p/596597

    A:平面,B:球面,C:旋转椭球面,D:椭球面,E:圆柱面,F:抛物柱面,G:椭圆柱面,H:旋转抛物面,I:圆锥面,J:椭圆锥面,K:马鞍面。则: (1)是____; (2)是______; (3)是______; (4)是______; (5)是______; (6)是______; (7)是______; (8)是______; (9)是______; (10)是______; (11)是______; (12)是______; (13)是______;/ananas/latex/p/1045101/ananas/latex/p/28097/ananas/latex/p/958152/ananas/latex/p/39419/ananas/latex/p/973515/ananas/latex/p/47030/ananas/latex/p/645788/ananas/latex/p/36944/ananas/latex/p/34552/ananas/latex/p/422334/ananas/latex/p/1045357/ananas/latex/p/36098/ananas/latex/p/596597

  • 2021-04-14 问题

    ________,________,________,________. /ananas/latex/p/365732/ananas/latex/p/365733/ananas/latex/p/365734/ananas/latex/p/365735

    ________,________,________,________. /ananas/latex/p/365732/ananas/latex/p/365733/ananas/latex/p/365734/ananas/latex/p/365735

  • 2021-04-14 问题

    设,在内,则在内( )/ananas/latex/p/243901/ananas/latex/p/22409/ananas/latex/p/243903/ananas/latex/p/2154/ananas/latex/p/22992

    设,在内,则在内( )/ananas/latex/p/243901/ananas/latex/p/22409/ananas/latex/p/243903/ananas/latex/p/2154/ananas/latex/p/22992

  • 2021-04-14 问题

    求的二阶导数/ananas/latex/p/55245: /ananas/latex/p/168648|/ananas/latex/p/25802|/ananas/latex/p/382158|/ananas/latex/p/8553

    求的二阶导数/ananas/latex/p/55245: /ananas/latex/p/168648|/ananas/latex/p/25802|/ananas/latex/p/382158|/ananas/latex/p/8553

  • 2021-04-14 问题

    判断下列积分值的大小: , , , 其中由 围成,则之间的大小顺序为/ananas/latex/p/2133704/ananas/latex/p/2133724/ananas/latex/p/2133733/ananas/latex/p/279/ananas/latex/p/206314/ananas/latex/p/575706/ananas/latex/p/920218/ananas/latex/p/149974/ananas/latex/p/16447

    判断下列积分值的大小: , , , 其中由 围成,则之间的大小顺序为/ananas/latex/p/2133704/ananas/latex/p/2133724/ananas/latex/p/2133733/ananas/latex/p/279/ananas/latex/p/206314/ananas/latex/p/575706/ananas/latex/p/920218/ananas/latex/p/149974/ananas/latex/p/16447

  • 2021-04-14 问题

    7.已知是实对称阵A的3个特征值,且对应于的特征向量分别为 则矩阵A=,则B矩阵中的各个元素 , , ; , , ; , , ./ananas/latex/p/404201/ananas/latex/p/404202/ananas/latex/p/404203/ananas/latex/p/2210847/ananas/latex/p/2210854/ananas/latex/p/2210858/ananas/latex/p/2210861/ananas/latex/p/2210863/ananas/latex/p/2210865/ananas/latex/p/2210869/ananas/latex/p/2210872/ananas/latex/p/2210875/ananas/latex/p/2210877

    7.已知是实对称阵A的3个特征值,且对应于的特征向量分别为 则矩阵A=,则B矩阵中的各个元素 , , ; , , ; , , ./ananas/latex/p/404201/ananas/latex/p/404202/ananas/latex/p/404203/ananas/latex/p/2210847/ananas/latex/p/2210854/ananas/latex/p/2210858/ananas/latex/p/2210861/ananas/latex/p/2210863/ananas/latex/p/2210865/ananas/latex/p/2210869/ananas/latex/p/2210872/ananas/latex/p/2210875/ananas/latex/p/2210877

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