匿名用户 2021-09-18 00:40 数学类Mathematics

Find the general solution of the differential equation y"-3y'+2y=2xe*

匿名用户 2021-09-18 10:53 数学类Mathematics

2 Let the function u(x,y,z)=+ 612*18, unit vector n =(1, 1,1), to calculate an1,2,3)

匿名用户 2021-09-18 10:44 数学类Mathematics

Find the convergence domain and sum function of the power series4n2+4n+32nn=02n+1七

匿名用户 2021-09-18 10:43 数学类Mathematics

Find the extremum of the function(x,y)=xe2+y2

匿名用户 2021-09-18 10:43 数学类Mathematics

2P roof: ++cos+(-1 <<).x

匿名用户 2021-09-18 10:42 数学类Mathematics

Let A, B, and C be random events, A and C incompatible and P(AB)= P(C)=, to calculate P(AB|).

匿名用户 2021-09-18 10:42 数学类Mathematics

Let a be the 3-dimensional unit column vector and E be the third-order unit matrix, then the rank of the matrix E-aa'.

匿名用户 2021-09-18 10:41 数学类Mathematics

Let=(x,y,z)x+y+z=1,x≥0,y≥0,z≥0, to calculate2ds

匿名用户 2021-09-18 10:41 数学类Mathematics

To calculate grad xyy(2,1,1)

匿名用户 2021-09-18 10:40 数学类Mathematics

To calculate x V2x-x'dx