• 2022-06-01
    设A,B均为三阶矩阵,丨A丨=-2丨B丨=3,则丨2A*B^T丨=
  • |2A*B^T|=2^3|A*||B^T|=8|A|^(3-1)|B|=8*(-2)^2*3=96.

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      丨1/2-1丨十丨1/3-1/2丨十丨1/4-1/3丨十.丨1/2014-1/2013丨

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      设集合A={x丨-1<x<2},B={x丨1<x<3},则A∪B=______. A: {x丨-1<x<2} B: {x丨1<x<3} C: {x丨1<x<2} D: {x丨-1<x<3}

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      士别三日,当刮目相看丨丨丨丨丨丨丨丨丨丨丨丨丨丨丨丨丨丨

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      化简2丨x-2丨-丨x+4丨