• 2022-05-31
    设函数y=y(x)由方程2^xy=x+y所确定,则dy|x=0=()
    A: (ln2-1)dx
    B: (l-ln2)dx
    C: (ln2-2)dx
    D: ln2dx
  • B

    内容

    • 0

      函数\(z = {x^y}\)的全微分为 A: \(dz = y{x^{y - 1}}dy + {x^y}\ln xdx\) B: \(dz = y{x^{y - 1}}dx + {x^y}dy\) C: \(dz = y{x^{y - 1}}dx + {x^y}\ln xdy\) D: \(dz = y{x^{y - 1}}dy + {x^y}dx\)

    • 1

      y=ln(3x), 则 dy = ( ) A: 1/(3x) dx B: ln3 dx C: 1/x dx D: ln3/x dx

    • 2

      已知\( y = \ln (x + 1) \),则\( \frac{dy}{dx}\left| {_{x = 0}} \right. \)=______ 。

    • 3

      Solve $\int_0^{1}x \ln^2{x}dx=$ :<br/>______

    • 4

      【单选题】y=ln(3x), 则 dy = () A. 1/(3x) dx B. ln3 dx C. 1/x dx D. ln3/x dx