新人求带，计算一个方程组
A = {{-2 (1 - a) - a,0, -(1 - a) Derivative -
a Derivative, (1 - a) (-x - y) +
a (-x - y)}, {0, -2 (1 - a), -(1 - a) Derivative[
r], -a (-a b + t)}, {-(1 - a) Derivative -
a Derivative, -(1 - a) Derivative[
r], (1 - a) (-x (c^\\) -
y (c^\\) - (p^\\)) +
a ((-Q - y) (c^\\) -
n (p^\\)), -a Derivative}, {A - c -
n x - n y - n (x + y), A - a b - c - t - n x - n y - n (x + y), 0,
x (-x - y) + (-x - y) y}}; B = {0, (-1 + a - a n) K, 0, -x K}
LinearSolve，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
程序有错误吧
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