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  • 2022-05-26
    平面绕原点旋转[tex=3.071x2.0]y9ImmFlGdm85y98UJCmiAb4nwVjYJgJvhHBK1BmReds=[/tex]，再平移[tex=4.714x1.286]arS3srm7lAFe9e52RLvfkw==[/tex]，与出变换公式，并求出点[tex=2.143x1.286]VykF7BpO3NFT550xU7Tx1w==[/tex] . 
    • [b]解[/b]     平面绕原点旋转[tex=2.786x2.357]bCsuRompa+97mfHBGUP75woXdfNCIRan/VM2RTiMH3A=[/tex]的变换[tex=1.5x1.0]M5lrEYXul6DaMZkncqfrOA==[/tex][tex=4.286x2.929]075gCzZzsMRb6HYXYk9X99nFBFdNkrWqzcPcoIaNSHa5/v4bwpHeLMlrqo3fC1Bj4n/nFTKnJEIY6tPGhWoF+Q4hNxOl5XmU+jNlIzH7TWY=[/tex][tex=14.143x5.214]075gCzZzsMRb6HYXYk9X90eTQyd2s09BmOWIbsKzXU+CW0haZPP0CAl6Ze2S2YxLbJEgHHUvepUoNnphthqwAQaq4J6kXToiXYEum+XMiJmlHD0gK+3958zWKdo1iBW5k3dNDjWjigFgtNKqPqUqFJn+emPl8cqNxPrnTR5vN4DqvdarAM3+0MlNN5s+V2aythjj8l9ZJEZsI0vZKmPpQzSy4bTP4bNSoFyixktP1AbpAG4OFBwuEPkr8bapRbgP[/tex][tex=8.214x2.786]075gCzZzsMRb6HYXYk9X9ya1gYsR5uC2jbB3/sbNe3tlG6vgi5G4kIXDdbKiUpDPkp2kRmEj7jQaZvEUPbphWDZbVW68rpWs3pi0Usq5TKf+ngI49qB7Mf2DCSLm9x3hPy8FZgnDHcNIAe7VvnpSaA==[/tex] . 平移 [tex=4.286x1.357]s6sLKaScKoLdDo5gQ94GRQ==[/tex]的变换[tex=1.5x1.0]tHoSBAmDGwDpPOrDk2+19w==[/tex] [tex=4.286x2.929]075gCzZzsMRb6HYXYk9X99nFBFdNkrWqzcPcoIaNSHa5/v4bwpHeLMlrqo3fC1Bj4n/nFTKnJEIY6tPGhWoF+Q4hNxOl5XmU+jNlIzH7TWY=[/tex][tex=8.357x2.786]075gCzZzsMRb6HYXYk9X9xpddONvL67YUUs5kjrj8c3OJ5lo6iOjaUOMaj+baNh0KhQAdbPDhPUaCII1HrFQNbpyOansq0U0RFeLm6XUV89UZgW7fpjeP5Emas4InrYUZJTILGO2IQLJXhUSKS02yA==[/tex][tex=3.786x2.786]075gCzZzsMRb6HYXYk9X9/tl7haPFT4v3ogxtBbHv/zAHl1qJZlgrROh3JqC537/Tmkf+MGbIe/vrm7+o1YYDQ==[/tex]，先绕原点旋转[tex=2.786x2.357]bCsuRompa+97mfHBGUP75woXdfNCIRan/VM2RTiMH3A=[/tex]，再平移[tex=4.286x1.357]0sX2fPepRDwOAXiDnEfjbA==[/tex]，即为 [tex=2.429x1.0]W5bg0USSKi/hzjS/Rl4d10+DYcu6Gj5GerFF5aZtW7I=[/tex] [tex=4.286x2.929]075gCzZzsMRb6HYXYk9X99nFBFdNkrWqzcPcoIaNSHa5/v4bwpHeLMlrqo3fC1Bj4n/nFTKnJEIY6tPGhWoF+Q4hNxOl5XmU+jNlIzH7TWY=[/tex][tex=13.786x2.786]075gCzZzsMRb6HYXYk9X9xpddONvL67YUUs5kjrj8c3OJ5lo6iOjaUOMaj+baNh0KhQAdbPDhPUaCII1HrFQNcQGsLzZN9rlyc/fPAPku0/gaPCwisq5VjtTH5vxFpf2IMau3sclmHnT2nCzXdcpQGX2F6Y9s5/qvH69oXGgdi3EaIhHkZWDx5ADFpoPh+Uhgl8lyMUWkJWBYqlkHAewzQ==[/tex][tex=4.714x2.786]075gCzZzsMRb6HYXYk9X9/tl7haPFT4v3ogxtBbHv/yFBdFwJmwDQotBSpFKYxskL2PLLMubye5Ot7DGuGeocg==[/tex][tex=9.143x2.786]075gCzZzsMRb6HYXYk9X9ya1gYsR5uC2jbB3/sbNe3tlG6vgi5G4kIXDdbKiUpDPkp2kRmEj7jQaZvEUPbphWDZbVW68rpWs3pi0Usq5TKf+ngI49qB7Mf2DCSLm9x3hCgc6kU7QZUva639OgWOOeQ==[/tex][tex=3.786x2.786]075gCzZzsMRb6HYXYk9X9/tl7haPFT4v3ogxtBbHv/zAHl1qJZlgrROh3JqC537/Tmkf+MGbIe/vrm7+o1YYDQ==[/tex]，于是点[tex=2.286x1.357]4AG4sq9ONHpAms0C151/TQ==[/tex]经此变换后的对应点的坐标是[tex=3.0x1.357]idSPrtK9ViAin56P6SgOdg==[/tex] . 
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    内容

    • 0

      求下列等距变换：绕原点旋转[tex=2.929x2.357]h9HJbSm9Zyrln2sFOGWBnA3bt6pAwCc62TiXOFYPa90=[/tex]，再按向量[tex=3.0x1.357]qsQqkYqzZ+6y725FsuSvVw==[/tex]平移.

    • 1

      以下四个命题中,正确的是  未知类型：{'options': ['若 [tex=2.143x1.286]FKq9v1pXcOtjy1Cl2h+pXv4qvrtr57gpoaVePO4m860=[/tex]在 [tex=2.143x1.286]VykF7BpO3NFT550xU7Tx1w==[/tex]内连续，则 [tex=1.857x1.286]G6WxJ307HB2e1l7Qz3uNbQ==[/tex]在[tex=2.143x1.286]VykF7BpO3NFT550xU7Tx1w==[/tex] 内有界', '若[tex=1.857x1.286]G6WxJ307HB2e1l7Qz3uNbQ==[/tex] 在[tex=2.143x1.286]VykF7BpO3NFT550xU7Tx1w==[/tex]内连续, 则[tex=1.857x1.286]G6WxJ307HB2e1l7Qz3uNbQ==[/tex]在 [tex=2.143x1.286]VykF7BpO3NFT550xU7Tx1w==[/tex]内有界', '若[tex=2.143x1.286]FKq9v1pXcOtjy1Cl2h+pXv4qvrtr57gpoaVePO4m860=[/tex]在[tex=2.143x1.286]VykF7BpO3NFT550xU7Tx1w==[/tex]内有界, 则 [tex=1.857x1.286]G6WxJ307HB2e1l7Qz3uNbQ==[/tex]在[tex=2.143x1.286]VykF7BpO3NFT550xU7Tx1w==[/tex]内有界', '若 [tex=1.857x1.286]G6WxJ307HB2e1l7Qz3uNbQ==[/tex] 在[tex=2.143x1.286]VykF7BpO3NFT550xU7Tx1w==[/tex]内有界,则[tex=2.143x1.286]FKq9v1pXcOtjy1Cl2h+pXv4qvrtr57gpoaVePO4m860=[/tex] 在[tex=2.143x1.286]VykF7BpO3NFT550xU7Tx1w==[/tex]内有界'], 'type': 102}

    • 2

      求由x轴、曲线[tex=4.071x1.429]hl4JpLynrxmqrmVdtohNfg==[/tex]及曲线[tex=4.071x1.429]hl4JpLynrxmqrmVdtohNfg==[/tex]过原点的切线所围成图形的面积, 并求该图形分别绕x轴与y轴旋转所得旋转体的体积.

    • 3

      Simplify the expression:$({\frac{3x^{3/2}y^3}{x^2y^{-1/2}})^{-2}}$Which answer is CORRECT? A: $9xy^7$ B: $\frac19 xy^{-7}$ C: $\frac19 x^{-1}y^7$ D: $9 x^{-1}y^7$

    • 4

      设随机变量X与Y，且D(X)=25 . D(Y)=36 .[tex=6.929x1.357]YRHgHmN/yZW92ECOHesamh6DUEs33HnR+2dxr68Tcr4=[/tex]求[tex=4.286x1.357]wxsI0NJpCsUWd6vdcOiJiw==[/tex]