匿名用户 2021-09-11 20:42 数学类Mathematics

To calculate limn→∞=1=(n+i)(n2+j2)

匿名用户 2021-09-11 20:42 数学类Mathematics

Let the lie number=z(x,y) determined by the equation FC, where is differentiable,andf20, to calculate+y

匿名用户 2021-09-11 20:41 数学类Mathematics

2x To calculate the limit lim (x-a) (x+b)

匿名用户 2021-09-11 20:41 数学类Mathematics

When x->0, if x- tanx and are infinitesimals of the same order, compute k.

匿名用户 2021-09-11 20:40 数学类Mathematics

Let's say the probability density of population x is() 2xe-x,>00, other where parameter(>)unknown, X1, X2, .... Xn... 查看全部

匿名用户 2021-09-11 20:39 数学类Mathematics

There are 1 red ball, 2 black balls and 3 white balls in the bag, and now they are put back and taken from the bag twice... 查看全部

匿名用户 2021-09-11 20:39 数学类Mathematics

Let f(x1, x2, x3) =ax? +ax2+(a-1)x3+2x1x3-2x2x3. (1)Find all eigenvalues of the matrix of quadratic form f; ()The criter... 查看全部

匿名用户 2021-09-11 20:38 数学类Mathematics

1-1 Let A=-1114151=1120-2 (1)Find all vectors 52, 53 that satisfy A52=51, A253=51 (2)For any vector in(1), 52, 53, it tu... 查看全部

匿名用户 2021-09-11 20:38 数学类Mathematics

Compute surface integral= xdydz ydzdx +zdxrdy where is the outside of thex2+y2+z surface2x2+2y2+z2=4.

匿名用户 2021-09-11 20:37 数学类Mathematics

Prove Lagrange theorem: if the functionx) in continuous on [a, b], can guide in the (a, b). there are E(a, b), makes the... 查看全部