. _(Y)(y)=dfrac (1)(2sqrt {2pi )}(e)^-dfrac (y{2)} ,gt 0-|||-bigcirc ._(Y)(y)=d
lim _(xarrow 0)dfrac (e-{e)^cos x}(sqrt [3]{{x)^2+1}-1}
lim _(xarrow 0)dfrac (e-{e)^cos x}(sqrt [3]{1+{x)^2}-1}=____________________.___
U=0-|||-(B) E=0 . =dfrac (q)(2pi {varepsilon )_(0)a}-|||-(C) =dfrac (q)(2pi {var
5.12 求下列各积分之值:-|||-(1) (int )_(0)^2pi dfrac (dtheta )(a+cos theta )(agt 1);-|||-
U=0 (B) E=0 , =dfrac (9)(2pi {varepsilon )_(0)a} q q-|||-(C) =dfrac (q)(2pi {var
(B) (mu ,dfrac (1)(sqrt {2pi )})-|||-(C) (mu ,dfrac (1)(2)), (D)(0,σ).
设X sim N(0,1),Phi(x) = (1)/(sqrt(2pi)) int_(-infty)^x e^-(t^2)/(2) dt,(x geq 0),
5.当x→0时,e-e^cos x是sqrt[3](1+x^2)-1的().A. 高阶无穷小B. 低阶无穷小C. 同阶但非等价无穷小D. 等价无穷小
(单选题) (int )_(0)^2pi (x)^2cos xdx= ().-|||-