已知\( y = x + \ln 2 \),则\( y' \)为( ).______
举一反三
- 已知\( y = 2{x^3} + 7x + \ln 3 \),则\( {y^{(3)}} \)为 。______
- 已知 \( y = \sin x + \ln 2 \),则 \( y' = \cos x + {1 \over 2} \)( ).
- 已知\( y = \ln (2{\rm{ + }}6x) \),则\( y'\left| {_{x = 0}} \right. \)为 .______
- 设\(z = {\log _y}x\),则\({z_y} = { { \ln x} \over {y { { \ln }^2}y}}\).
- 已知\( y = {x^x} \),则\( y' \)为( ). A: \( {x^x} \) B: \( {x \over {1 + {x^2}}} \) C: \( {1 \over {1 + {x^2}}} \) D: \( {x^x}(1 + \ln x) \)