匿名用户 2021-09-11 20:13 数学类Mathematics

Let A be the third order real symmetric matrix, if the quadratic equation: The graph of the standard equation under the ... 查看全部

匿名用户 2021-09-11 20:12 数学类Mathematics

In the following differential equation, compute the general solution of the equationy=c1ex+c2cos2x+c3sin2x(,c2,3 are arb... 查看全部

匿名用户 2021-09-11 20:11 数学类Mathematics

Compute the gradient of the function(x, y)= arctan at the point(0,1).

匿名用户 2021-09-11 20:10 数学类Mathematics

A function f(x)=In(2+t), calculating the number of zero in the f(x).

匿名用户 2021-09-11 20:09 数学类Mathematics

Let's say the probability density of population x is1,0

匿名用户 2021-09-11 20:08 数学类Mathematics

Let the probability density of the two-dimensional random variable(X,Y) be f(x,y)2-x-y,02Y} (2)Find the probability dens... 查看全部

匿名用户 2021-09-11 20:07 数学类Mathematics

Set order eigenvalues of real symmetric matrix A, A1 =1, =2, A3 =-2, and a1 =(1,1, 1)is A to belong to 11, let B A5-4A3 ... 查看全部

匿名用户 2021-09-11 20:06 数学类Mathematics

x1+x2+x3=0, Set linear equationsx1+2x2+ax3=0, has common solution to the equationx1+4x2+a2x3=0x1+2x2+x3=a-1, find the va... 查看全部

匿名用户 2021-09-11 20:03 数学类Mathematics

Let the power series a x" converge within (-oo, +oo), and its sum functions satisfy:n=0y"-2xy′-4y=0,y(0)=0,y'(0)=1.← (1)... 查看全部

匿名用户 2021-09-11 20:02 数学类Mathematics

Function f(x),(x) in continuous on [a, b], in the (a, b) is the second derivative is equal to the maximum, f(a)=(a),(b)=... 查看全部