• 2022-05-31
    已知,点[tex=4.714x1.357]9WDCxKpJX6MlM8ay5mqhaA==[/tex]和[tex=3.929x1.357]PfL0e86w6WS+88G73vPtIg==[/tex],试在[tex=0.5x0.786]C7x+w8+jOPZzxFrGGne6Dw==[/tex]轴上求一点[tex=0.714x1.0]zAR8JLTji7MW5PnI4azq+Q==[/tex]使[tex=3.143x1.214]BypMH6cWAb0x8gikbHmOkm8G6z9CQ+Rgr92Svssi5/0=[/tex]的面积最小.
  • 解 设[tex=4.0x1.357]fvbTEvONHgOaQVNw87xcoQ==[/tex],则[tex=3.143x1.214]BypMH6cWAb0x8gikbHmOkm8G6z9CQ+Rgr92Svssi5/0=[/tex]的面积[tex=12.0x4.857]gj0g4TgW/+iPJAx0RjWwyl4BuwU6f0eNVEQYYa/p1itBjVHq9wmb7rfIkj65zfpUwio9lX7/NVihuKe0DU6DnmrxjTESf1oSfGxoDz8Ftx1DHgIVpV3Qqz1dPSUFEXHVZ6Pb41gPol8PJEzOO+O8ymHRD52eYQSRRBcnsHvnFV72u7NqCCp4EWKgaRFE15Ot[/tex][tex=10.571x8.214]rbedMgATwa4IO5gu3qkvim/5m1AoEY/tWPkGFh+tCPv+m/wTHLo55cFFK0XgLIXNy/crdjYrLvLBoEJsqNnP61u0+tY9i12nDUKIvqFnQtfcNZ6mpKGY5/AN6COP/KT0ZXql/eFcVL6Kk878Xw8Ml2JRSuNBkYPICbJFLNyyg/PwhIdeYEg8HOUtHDP3sK6K[/tex]故[tex=2.286x2.357]E3DDzgWSdmkT8fnHh37ccg==[/tex],即[tex=5.143x2.786]9dnfK+lh9zqbU06/jcbIrUT3s1TteCbOHQtdWa8z8sdo1HUip/8e8phDnVhvSYIY[/tex]时[tex=3.143x1.214]BypMH6cWAb0x8gikbHmOkm8G6z9CQ+Rgr92Svssi5/0=[/tex]的面积是小.

    举一反三

    内容

    • 0

      set1 = {x for x in range(10)} print(set1) 以上代码的运行结果为? A: {0, 1, 2, 3, 4, 5, 6, 7, 8, 9} B: {0, 1, 2, 3, 4, 5, 6, 7, 8, 9,10} C: {1, 2, 3, 4, 5, 6, 7, 8, 9} D: {1, 2, 3, 4, 5, 6, 7, 8, 9,10}

    • 1

      已知空间 4 点 [tex=19.429x1.357]Ld4MEIHZvSvKQnQuEATwUdHQPq95xvmiBfa/vp7cWrbFhWkJjD5RJRcWG0Kbnai3[/tex].求[tex=3.143x1.214]BypMH6cWAb0x8gikbHmOkm8G6z9CQ+Rgr92Svssi5/0=[/tex]的面积.

    • 2

      假设“☆”是一种新的运算,若3☆2=3×4,6☆3=6×7×8,x☆4=840(x>0),那么x等于: A: 2 B: 3 C: 4 D: 5 E: 6 F: 7 G: 8 H: 9

    • 3

      以下创建数组的方式错误的是() A: shortx[];x={1,2,3,4,5,6}; B: shortx[]=newshort[6];x[0]=9;x[1]=8;x[2]=7;x[3]=6;x[4]=5;x[5]=4; C: shortx[]=newshort[6];intlen=x.length;for(inti=0;i

    • 4

      若:(1)函数 f(x)在点[tex=3.714x1.357]7VByCIzkNySq3s2l9I6f5zccNJDeV+6SQrVr3iwjgB0=[/tex]有导数,而函数g(x)在点[tex=2.286x1.0]DSJKaWfJALImFxxTg/8qhA==[/tex]没有导数;(2)函数f(x)在点[tex=3.714x1.357]7VByCIzkNySq3s2l9I6f5zccNJDeV+6SQrVr3iwjgB0=[/tex]没有导数,而函数g(x)在点[tex=2.286x1.0]DSJKaWfJALImFxxTg/8qhA==[/tex]有导数;(3)函数f(x)在点[tex=3.714x1.357]7VByCIzkNySq3s2l9I6f5zccNJDeV+6SQrVr3iwjgB0=[/tex]没有导数及函数g(x)在点[tex=2.286x1.0]DSJKaWfJALImFxxTg/8qhA==[/tex]没有导数,则函数[tex=5.643x1.357]GmtX7Vop79exGU/rpqXUYw==[/tex]在已知点[tex=2.286x1.0]DSJKaWfJALImFxxTg/8qhA==[/tex]的可微性怎样?