标题: 新人求带，计算一个方程组 [打印本页] 作者: xiaoge603 时间: 2016-1-4 11:05 标题: 新人求带，计算一个方程组 A = {{-2 (1 - a) - a, $ _( c6 q; O6 q+ \
0, -(1 - a) Derivative[1][c][r] - : v6 m6 b4 d3 T. C0 g
a Derivative[1][c][r], (1 - a) (-x - y) + + X8 i+ p+ j3 j8 a# l/ k( V a (-x - y)}, {0, -2 (1 - a), -(1 - a) Derivative[1][c][; w5 r }3 ~5 s3 v+ b0 S
r], -a (-a b + t)}, {-(1 - a) Derivative[1][c][r] - 2 p$ b$ ~: N0 q3 r% l a Derivative[1][c][r], -(1 - a) Derivative[1][c][, c$ X' ]2 X' j# M
r], (1 - a) (-x (c^\[Prime]\[Prime])[r] - * [5 D$ X# i* T$ L
y (c^\[Prime]\[Prime])[r] - (p^\[Prime]\[Prime])[r]) + ( W) ~! @# z7 R& j. h a ((-Q - y) (c^\[Prime]\[Prime])[r] - " \! {$ T1 d2 w0 \ n (p^\[Prime]\[Prime])[r]), -a Derivative[1][p][r]}, {A - c - D6 j, Y" a: M4 x& ~
n x - n y - n (x + y), A - a b - c - t - n x - n y - n (x + y), 0, , z4 i+ S! g: ?. C9 S x (-x - y) + (-x - y) y}}; B = {0, (-1 + a - a n) K, 0, -x K}" s) Y! z% b2 i, ?: j$ y
LinearSolve[A, B]，为何解不出来。。。。。每次都是显示一些递归深度之类的。。。。求解求解, z# I5 g1 s1 a( h
]- f0 s h1 g3 i- J3 R' S# C* u1 Q. J' [ 作者: 数学中国YY主管 时间: 2016-1-8 16:41
程序有错误吧 2 Y4 O0 K6 _! k o' Y1 N