∫022−x2dx=\int_{0}^{\sqrt{2}} \sqrt{2 - x^2}dx =∫022−x2dx=( ).
(A)12π\dfrac{1}{2}\pi21π
(B)π\piπ
(C)32π\dfrac{3}{2}\pi23π
(D)2π2\pi2π
函数y=23x3+3xy = \dfrac{2}{3}x^3 + 3xy=32x3+3x的极值点为( ).
(A)x=−3x = - 3x=−3
(B)x=3x = 3x=3
(C)x=−1x = - 1x=−1
(D)x=1x = 1x=1
已知函数y=exlnxy = e^{x}\ln xy=exlnx,则y′(1)=y'(1) =y′(1)=( ).
(A)2e2e2e
(B)eee
(C)0
(D)1
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