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, " Y- A Z- j: Y% U5 m1 ^; Q
0, -(1 - a) Derivative[1][c][r] - 5 o0 z# O a$ T2 y: u; _; W a Derivative[1][c][r], (1 - a) (-x - y) + & @; w) g% a7 h9 P: `5 A
a (-x - y)}, {0, -2 (1 - a), -(1 - a) Derivative[1][c][ . a1 A" ?4 ?1 o6 M& o" ^, k r], -a (-a b + t)}, {-(1 - a) Derivative[1][c][r] - 3 o: p1 W9 \ {5 n: ]) h a Derivative[1][c][r], -(1 - a) Derivative[1][c][+ s* y! c3 E/ w% U0 |2 X
r], (1 - a) (-x (c^\[Prime]\[Prime])[r] - 1 m4 }: ^( T' }* c y (c^\[Prime]\[Prime])[r] - (p^\[Prime]\[Prime])[r]) + " }2 \, k8 V. U
a ((-Q - y) (c^\[Prime]\[Prime])[r] - 6 W6 H0 L. O: W, R+ t
n (p^\[Prime]\[Prime])[r]), -a Derivative[1][p][r]}, {A - c - 2 t; [$ A; K9 i) s6 u& Q n x - n y - n (x + y), A - a b - c - t - n x - n y - n (x + y), 0, / i/ ]1 |7 [* U4 t4 U5 W- {6 t x (-x - y) + (-x - y) y}}; B = {0, (-1 + a - a n) K, 0, -x K}1 d# g o! T0 u) L" U6 g
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5 ]9 E |+ S1 t+ F/ u7 N
* @, r$ J. r3 C4 h) p! F* p2 Y# W4 n* K 作者: 数学中国YY主管 时间: 2016-1-8 16:41
程序有错误吧 3 W. I' d. O, {