百度试题 结果1 题目1.填空。1.填空。A \$\frac { + A } { B }\$ \$\begin{aligned} B & \sqrt { A B } \\ & \frac { A B } { 0 } \end{aligned}\$ A=() 相关知识点: 试题来源: 解析 1.A=3,B=6 反馈 收藏
如果 $X$ 服从标准正态分布 $N(0,1)$，那么 $Y=2X$ 服从变换后的正态分布 $N(0,4)$。具体地说，对于任意的实数 $y$，有：\begin{aligned}P(Y\le y)&=P(2X\le y)\&=P\left(X\le\frac{y}{2}\right)\&=\Phi\left(\frac{y}{2}\right)\end{aligned} 其中 $\Phi(x)$ ...
【题目】 \$\left\{ \begin{aligned} x + y & = z & & ( 1 ) \\ 2 x + 6 z & = 1 8 & & ( 2 ) \\ 3 y + 6 z & = 9 & & ( 3 ) \end{aligned} \right.\$ 相关知识点: 试题来源: 解析 【解析】分别为1,2,3式 【解析】分别为1,2,3式 【解析】分别为...
to the total cross section according to the collinear factorization theorem, the inclusive total cross section for the production of a single gauge boson in hadron-hadron collisions can be written as $$\begin{aligned} \sigma _{\mathrm{tot}}(h_1 h_2\rightarrow v+x)= & {} \sum _{i,...
|, then one can restrict the considerations to the fields of the form $$\begin{aligned} e(x)=\alpha (r,x_3)\begin{pmatrix}-x_2\\ x_1\\ 0\end{pmatrix},\qquad r=\sqrt{x_1^2+x_2^2}, \end{aligned}$$ (1.2) which are divergence-free, so \(\nabla \times (\nabla \...
以 VSCode 为例，搜索的正则表达式是\$\$([\n\w\W]*?)\$\$，替换内容是\begin{equation}$1\...
\$\left\{ \begin{aligned} \frac { 1 } { x } + \frac { 1 } { y } & = 1 7 \\ \frac { 1 } { x y } & = 6 0 \end{aligned} \right.\$ 相关知识点: 试题来源: 解析 【解析】和 _ 是方程 _ 的两 【解析】和 _ 是方程 _ 的两 【解析】和 _ 是方程 ...
\$\left\{ \begin{aligned} x + y & = \frac { 1 } { 3 } \\ x + 3 y & = \frac { 5 } { 3 } \end{aligned} \right.\$ \$\left\{ \begin{aligned} x + y & = \frac { 1 } { 3 } \\ x + 3 y & = \frac { 5 } { 3 } \end{aligned} \right....
is the euclidean space. in the latter case, the dirichlet boundary condition may be interpreted as $$\begin{aligned} u\rightarrow 0, \quad \text {as}\quad |x|\rightarrow \infty . \end{aligned}$$ let us note that the functional \(\mu [u]\) ensures that the \(l^2\) -norm is...
four-body decays in pqcd can be described in terms of $$\begin{aligned} \mathcal {a}=\phi _b\otimes h\otimes \phi _{\pi \pi }\otimes \phi _{\pi \pi }, \end{aligned}$$ (1) where \(\phi _b\) is the b meson da, and the two-hadron da \(\phi _{\pi \pi }\) ...