已知函数y=ln2x,则dy=?
举一反三
- 已知y=ln(1+x^2),在x=1处的微分dy=
- 已知\( y = \ln (x + 1) \)，则\( \frac{dy}{dx}\left| {_{x = 0}} \right. \)=______ 。
- 设函数y=ln tanx，则dy=______
- 已知\( y = x + \ln 2 \)，则\( y' \)为( ).______
- 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: \(dz = y{x^{y - 1}}dy + {x^y}dx\)