新人求带，计算一个方程组

xiaoge603

A = {{-2 (1 - a) - a,
; \- E& R$ B1 G, K; W- ]   0, -(1 - a) Derivative[1][c][r] -
0 ~: w! `+ e) E; S% P% @0 Q2 t9 q    a Derivative[1][c][r], (1 - a) (-x - y) +
) e' U) w+ I+ L& u5 P    a (-x - y)}, {0, -2 (1 - a), -(1 - a) Derivative[1][c][
     r], -a (-a b + t)}, {-(1 - a) Derivative[1][c][r] -
; a' R( @$ ]9 }* r    a Derivative[1][c][r], -(1 - a) Derivative[1][c][
! i# E: f) y) J: f) E     r], (1 - a) (-x (c^\[Prime]\[Prime])[r] -
+ y( ?- ?" P. Z3 p       y (c^\[Prime]\[Prime])[r] - (p^\[Prime]\[Prime])[r]) +
    a ((-Q - y) (c^\[Prime]\[Prime])[r] -
       n (p^\[Prime]\[Prime])[r]), -a Derivative[1][p][r]}, {A - c -
4 H# Q0 a) F1 D" L  Z$ q; H/ r    n x - n y - n (x + y), A - a b - c - t - n x - n y - n (x + y), 0,
# R& L  Z. v3 W( w! C' C    x (-x - y) + (-x - y) y}}; B = {0, (-1 + a - a n) K, 0, -x K}
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 X: _7 b% D. x0 n0 Q1 _

数学中国YY主管

程序有错误吧
) c* z$ B" ]" [& N