\( d({e^ { { x^2}}} + 3) = 2x{e^ { { x^2}}}dx \)（ ）.
举一反三
- 函数\(z = {e^ { { x^2} - 2y}}\)的全微分为 A: \(<br/>dz = 2x{e^ { { x^2} - 2y}}dx +2{e^ { { x^2} - 2y}}dy\) B: \(<br/>dz = 2x{e^ { { x^2} - 2y}}dx - 2{e^ { { x^2} - 2y}}dy\) C: \(<br/>dz = 2x{e^ { { x^2} - 2y}}dy+ 2{e^ { { x^2} - 2y}}dx\) D: \(<br/>dz = 2x{e^ { { x^2} - 2y}}dy - 2{e^ { { x^2} - 2y}}dx\)
- 函数\(y = {e^{ - {x^2}}}\)的导数为( ). A: \( - 2x{e^{ - {x^2}}}\) B: \(2x{e^{ - {x^2}}}\) C: \( - 2x{e^ { { x^2}}}\) D: \(2x{e^ { { x^2}}}\)
- 设\(z = u{e^v}\)，\(u = {x^2} + {y^2}\)，\(v = xy\)，则\( { { \partial z} \over {\partial x}}=\) A: \({e^{xy}}({x^2}y + {y^3} + 2x)\) B: \({e^{xy}}({x}y^2 + {y^3} + 2x)\) C: \({e^{xy}}({x}y + {y^3} + 2x)\) D: \({e^{xy}}({x^2}y + {y^2} + 2x)\)
- $\int(3x-2) dx$ A: $3x^2-2x + C$ B: $3x-2 +C$ C: $\frac{3}{2} x^2 -2x$ D: $\frac{3}{2} x^2 -2x + C$
- ∫(0,+∞)[(x^2)e^(-2x)]dx