匿名用户 2021-10-02 14:31 数学类Mathematics

11 Prove that the n-order matrix11:111:1 is similar to00:00:012:n0

匿名用户 2021-10-02 14:31 数学类Mathematics

Find the plane tangent to the surface=x +y at the points (1,0,0) and (0,1,0).

匿名用户 2021-10-02 14:30 数学类Mathematics

In order to understand the accuracy of a balance, an engineer uses the balance to measure the mass of an object n times.... 查看全部

匿名用户 2021-10-02 14:29 数学类Mathematics

Let the random variables X and Y be independent of each other, and the probability distribution of X is P(X =0 =PX== and... 查看全部

匿名用户 2021-10-02 14:28 数学类Mathematics

Let the quadratic form(x1,x2,x3)=2x-x2+ax3+2x1x2-8x1x3+2x2x3the standard form +2 under the orthogonal transformation x Q... 查看全部

匿名用户 2021-10-02 14:27 数学类Mathematics

3 order matrix A =(, a2, a3) there are three different characteristic value, and=a1+2a2 (1)Prove that=(A); (2)Let B=a1+a... 查看全部

匿名用户 2021-10-02 14:26 数学类Mathematics

Let' s be the finite part of conical surface=√x2+y2 cut off by cylinder z22=2x,and its density at any point is u(x,y,)=9... 查看全部

匿名用户 2021-10-02 14:25 数学类Mathematics

Let the functionx) have the2 2nd derivative on the interval[o.andf(1)>0.lim(x)0.+x Proof: (1)The equation f(x) =0 has... 查看全部

匿名用户 2021-10-02 14:25 数学类Mathematics

Given the function y(x) determined by the equation x'+y'-3x+3y-2=0, find the extreme value of y(x).

匿名用户 2021-10-02 14:24 数学类Mathematics

To calculate lim∑k In 1+2nk=1n