匿名用户 2021-08-16 18:45 数学类Mathematics

Calculate the surface integral where S is composed of the surface  surrounded by the outer surface of the body.

匿名用户 2021-08-16 18:42 数学类Mathematics

Let's call D is x² + y²≤ R², to calculate 

匿名用户 2021-08-16 18:40 数学类Mathematics

We know that the two bases for R³ are 

匿名用户 2021-08-16 18:38 数学类Mathematics

Let the probability density of our random variable x be  

匿名用户 2021-08-16 18:37 数学类Mathematics

 Let the random variable x be uniformly distributed over (0,2), and calculate the probability density 

匿名用户 2021-08-16 18:35 数学类Mathematics

Let A start from the point (0,1) and move forward along the Y-axis with A constant velocity v. Object B starts from poin... 查看全部

匿名用户 2021-08-16 18:34 数学类Mathematics

 Let A be the  matrix and B be the  matrix, where n < M and E are identity matrices of order n, and if AB = E, show t... 查看全部

匿名用户 2021-08-16 18:29 数学类Mathematics

  We know that f(x₁,x₂,x₃)=2x₁²+3x₂²+3x₃²+2ax₂x₃(a＞0) by orthogonal transformation into the standard form find the param... 查看全部

匿名用户 2021-08-16 18:20 数学类Mathematics

In [0, +∞) on the function f (x) has a continuous derivative, and f’ (x) ≥k＞0;, f (0) <0, proved that f (x) in the (0... 查看全部