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很快就出结果了呀，你在未知量{A,B,C,D}前面的逗号之前少了一个}就是方程需要用{}括起来，你只写了{，没写}结果如下：{{A -> 0. + (1. (-1. ((0. xi - 1. xim1) (-0.5 xi^3 -1. (0.5 xi + xim1)^3) -1. (-0.5 xi - 1. (0.5 xi + xim1)) (0.5 xi^3 -1. (0.5 xi + xi

爱浪的刀

606人浏览 · 2021-06-28 08:10:04

爱浪的刀 · 2021-06-28 08:10:04 发布

很快就出结果了呀，你在未知量{A,B,C,D}前面的逗号之前少了一个}

就是方程需要用{}括起来，你只写了{，没写}

结果如下：

{{A -> 0. + (1. (-1. ((0. xi - 1. xim1) (-0.5 xi^3 -

1. (0.5 xi + xim1)^3) -

1. (-0.5 xi - 1. (0.5 xi + xim1)) (0.5 xi^3 -

1. (0.5 xi + xim1)^3)) (-1. (1.09091 +

0. (0.5 xi + xim1)) (-0.5 xi^2 +

1. (0.5 xi + xim1)^2) + (0. xi -

1. xim1) (0. (0.5 xi + xim1)^2 +

2. (0.0454545 (-0.5 xi - 0.5 xim1) +

0.0454545 (0.5 xi + 0.5 xip1)))) + (-0.25 xi^3 +

1. xi^2 xim1 + 1. xi xim1^2 +

0. xim1^3) (-1. (1.09091 +

0. (0.5 xi + xim1)) (0.5 xi^3 -

1. (0.5 xi + xim1)^3) + (0. xi -

1. xim1) (0. (0.5 xi + xim1)^3 +

3. (0.0454545 (0.5 xi + 0.5 xim1)^2 +

0.0454545 (0.5 xi + 0.5 xip1)^2)))))/(-1. ((0. xi -

1. xim1) (-0.5 xi^3 - 1. (0.5 xi + xim1)^3) -

1. (-0.5 xi - 1. (0.5 xi + xim1)) (0.5 xi^3 -

1. (0.5 xi + xim1)^3)) (-1. (-0.5 xi^2 +

1. (0.5 xi + xim1)^2) (-1. (0.5 xi + xim1) -

1. (0.5 xi + xip1)) + (0. xi -

1. xim1) (1. (0.5 xi + xim1)^2 -

1. (0.5 xi + xip1)^2)) + (-0.25 xi^3 + 1. xi^2 xim1 +

1. xi xim1^2 +

0. xim1^3) (-1. (0.5 xi^3 -

1. (0.5 xi + xim1)^3) (-1. (0.5 xi + xim1) -

1. (0.5 xi + xip1)) + (0. xi -

1. xim1) (-1. (0.5 xi + xim1)^3 -

1. (0.5 xi + xip1)^3))) +

1. ((-1. (1.09091 + 0. (0.5 xi + xim1)) (-0.5 xi^2 +

1. (0.5 xi + xim1)^2) + (0. xi -

1. xim1) (0. (0.5 xi + xim1)^2 +

2. (0.0454545 (-0.5 xi - 0.5 xim1) +

0.0454545 (0.5 xi + 0.5 xip1))))/(-0.25 xi^3 +

1. xi^2 xim1 + 1. xi xim1^2 +

0. xim1^3) - (1. (-1. ((0. xi - 1. xim1) (-0.5 xi^3 -

1. (0.5 xi + xim1)^3) -

1. (-0.5 xi - 1. (0.5 xi + xim1)) (0.5 xi^3 -

1. (0.5 xi + xim1)^3)) (-1. (1.09091 +

0. (0.5 xi + xim1)) (-0.5 xi^2 +

1. (0.5 xi + xim1)^2) + (0. xi -

1. xim1) (0. (0.5 xi + xim1)^2 +

2. (0.0454545 (-0.5 xi - 0.5 xim1) +

0.0454545 (0.5 xi + 0.5 xip1)))) + (-0.25 xi^3 +

1. xi^2 xim1 + 1. xi xim1^2 +

0. xim1^3) (-1. (1.09091 +

0. (0.5 xi + xim1)) (0.5 xi^3 -

1. (0.5 xi + xim1)^3) + (0. xi -

1. xim1) (0. (0.5 xi + xim1)^3 +

3. (0.0454545 (0.5 xi + 0.5 xim1)^2 +

0.0454545 (0.5 xi +

0.5 xip1)^2)))) (-1. (-0.5 xi^2 +

1. (0.5 xi + xim1)^2) (-1. (0.5 xi + xim1) -

1. (0.5 xi + xip1)) + (0. xi -

1. xim1) (1. (0.5 xi + xim1)^2 -

1. (0.5 xi + xip1)^2)))/((-0.25 xi^3 + 1. xi^2 xim1 +

1. xi xim1^2 +

0. xim1^3) (-1. ((0. xi - 1. xim1) (-0.5 xi^3 -

1. (0.5 xi + xim1)^3) -

1. (-0.5 xi - 1. (0.5 xi + xim1)) (0.5 xi^3 -

1. (0.5 xi + xim1)^3)) (-1. (-0.5 xi^2 +

1. (0.5 xi + xim1)^2) (-1. (0.5 xi + xim1) -

1. (0.5 xi + xip1)) + (0. xi -

1. xim1) (1. (0.5 xi + xim1)^2 -

1. (0.5 xi + xip1)^2)) + (-0.25 xi^3 +

1. xi^2 xim1 + 1. xi xim1^2 +

0. xim1^3) (-1. (0.5 xi^3 -

1. (0.5 xi + xim1)^3) (-1. (0.5 xi + xim1) -

1. (0.5 xi + xip1)) + (0. xi -

1. xim1) (-1. (0.5 xi + xim1)^3 -

1. (0.5 xi + xip1)^3))))) +

1. ((1.09091 + 0. (0.5 xi + xim1))/(

0. xi - 1. xim1) - (1. (-1. ((0. xi - 1. xim1) (-0.5 xi^3 -

1. (0.5 xi + xim1)^3) -

1. (-0.5 xi - 1. (0.5 xi + xim1)) (0.5 xi^3 -

1. (0.5 xi + xim1)^3)) (-1. (1.09091 +

0. (0.5 xi + xim1)) (-0.5 xi^2 +

1. (0.5 xi + xim1)^2) + (0. xi -

1. xim1) (0. (0.5 xi + xim1)^2 +

2. (0.0454545 (-0.5 xi - 0.5 xim1) +

0.0454545 (0.5 xi + 0.5 xip1)))) + (-0.25 xi^3 +

1. xi^2 xim1 + 1. xi xim1^2 +

0. xim1^3) (-1. (1.09091 +

0. (0.5 xi + xim1)) (0.5 xi^3 -

1. (0.5 xi + xim1)^3) + (0. xi -

1. xim1) (0. (0.5 xi + xim1)^3 +

3. (0.0454545 (0.5 xi + 0.5 xim1)^2 +

0.0454545 (0.5 xi + 0.5 xip1)^2)))) (-1. (0.5 xi +

xim1) - 1. (0.5 xi + xip1)))/((0. xi -

1. xim1) (-1. ((0. xi - 1. xim1) (-0.5 xi^3 -

1. (0.5 xi + xim1)^3) -

1. (-0.5 xi - 1. (0.5 xi + xim1)) (0.5 xi^3 -

1. (0.5 xi + xim1)^3)) (-1. (-0.5 xi^2 +

1. (0.5 xi + xim1)^2) (-1. (0.5 xi + xim1) -

1. (0.5 xi + xip1)) + (0. xi -

1. xim1) (1. (0.5 xi + xim1)^2 -

1. (0.5 xi + xip1)^2)) + (-0.25 xi^3 +

1. xi^2 xim1 + 1. xi xim1^2 +

0. xim1^3) (-1. (0.5 xi^3 -

1. (0.5 xi + xim1)^3) (-1. (0.5 xi + xim1) -

1. (0.5 xi + xip1)) + (0. xi -

1. xim1) (-1. (0.5 xi + xim1)^3 -

1. (0.5 xi + xip1)^3)))) -

1/(0. xi - 1. xim1)

1. (-0.5 xi -

1. (0.5 xi +

xim1)) ((-1. (1.09091 + 0. (0.5 xi + xim1)) (-0.5 xi^2 +

1. (0.5 xi + xim1)^2) + (0. xi -

1. xim1) (0. (0.5 xi + xim1)^2 +

2. (0.0454545 (-0.5 xi - 0.5 xim1) +

0.0454545 (0.5 xi + 0.5 xip1))))/(-0.25 xi^3 +

1. xi^2 xim1 + 1. xi xim1^2 +

0. xim1^3) - (1. (-1. ((0. xi - 1. xim1) (-0.5 xi^3 -

1. (0.5 xi + xim1)^3) -

1. (-0.5 xi - 1. (0.5 xi + xim1)) (0.5 xi^3 -

1. (0.5 xi + xim1)^3)) (-1. (1.09091 +

0. (0.5 xi + xim1)) (-0.5 xi^2 +

1. (0.5 xi + xim1)^2) + (0. xi -

1. xim1) (0. (0.5 xi + xim1)^2 +

2. (0.0454545 (-0.5 xi - 0.5 xim1) +

0.0454545 (0.5 xi + 0.5 xip1)))) + (-0.25 xi^3 +

1. xi^2 xim1 + 1. xi xim1^2 +

0. xim1^3) (-1. (1.09091 +

0. (0.5 xi + xim1)) (0.5 xi^3 -

1. (0.5 xi + xim1)^3) + (0. xi -

1. xim1) (0. (0.5 xi + xim1)^3 +

3. (0.0454545 (0.5 xi + 0.5 xim1)^2 +

0.0454545 (0.5 xi +

0.5 xip1)^2)))) (-1. (-0.5 xi^2 +

1. (0.5 xi + xim1)^2) (-1. (0.5 xi + xim1) -

1. (0.5 xi + xip1)) + (0. xi -

1. xim1) (1. (0.5 xi + xim1)^2 -

1. (0.5 xi + xip1)^2)))/((-0.25 xi^3 +

1. xi^2 xim1 + 1. xi xim1^2 +

0. xim1^3) (-1. ((0. xi - 1. xim1) (-0.5 xi^3 -

1. (0.5 xi + xim1)^3) -

1. (-0.5 xi - 1. (0.5 xi + xim1)) (0.5 xi^3 -

1. (0.5 xi + xim1)^3)) (-1. (-0.5 xi^2 +

1. (0.5 xi + xim1)^2) (-1. (0.5 xi + xim1) -

1. (0.5 xi + xip1)) + (0. xi -

1. xim1) (1. (0.5 xi + xim1)^2 -

1. (0.5 xi + xip1)^2)) + (-0.25 xi^3 +

1. xi^2 xim1 + 1. xi xim1^2 +

0. xim1^3) (-1. (0.5 xi^3 -

1. (0.5 xi + xim1)^3) (-1. (0.5 xi + xim1) -

1. (0.5 xi + xip1)) + (0. xi -

1. xim1) (-1. (0.5 xi + xim1)^3 -

1. (0.5 xi + xip1)^3)))))),

B -> -((1. (1.09091 + 0. (0.5 xi + xim1)))/(

0. xi - 1. xim1)) + (1. (-1. ((0. xi - 1. xim1) (-0.5 xi^3 -

1. (0.5 xi + xim1)^3) -

1. (-0.5 xi - 1. (0.5 xi + xim1)) (0.5 xi^3 -

1. (0.5 xi + xim1)^3)) (-1. (1.09091 +

0. (0.5 xi + xim1)) (-0.5 xi^2 +

1. (0.5 xi + xim1)^2) + (0. xi -

1. xim1) (0. (0.5 xi + xim1)^2 +

2. (0.0454545 (-0.5 xi - 0.5 xim1) +

0.0454545 (0.5 xi + 0.5 xip1)))) + (-0.25 xi^3 +

1. xi^2 xim1 + 1. xi xim1^2 +

0. xim1^3) (-1. (1.09091 +

0. (0.5 xi + xim1)) (0.5 xi^3 -

1. (0.5 xi + xim1)^3) + (0. xi -

1. xim1) (0. (0.5 xi + xim1)^3 +

3. (0.0454545 (0.5 xi + 0.5 xim1)^2 +

0.0454545 (0.5 xi + 0.5 xip1)^2)))) (-1. (0.5 xi +

xim1) - 1. (0.5 xi + xip1)))/((0. xi -

1. xim1) (-1. ((0. xi - 1. xim1) (-0.5 xi^3 -

1. (0.5 xi + xim1)^3) -

1. (-0.5 xi - 1. (0.5 xi + xim1)) (0.5 xi^3 -

1. (0.5 xi + xim1)^3)) (-1. (-0.5 xi^2 +

1. (0.5 xi + xim1)^2) (-1. (0.5 xi + xim1) -

1. (0.5 xi + xip1)) + (0. xi -

1. xim1) (1. (0.5 xi + xim1)^2 -

1. (0.5 xi + xip1)^2)) + (-0.25 xi^3 + 1. xi^2 xim1 +

1. xi xim1^2 +

0. xim1^3) (-1. (0.5 xi^3 -

1. (0.5 xi + xim1)^3) (-1. (0.5 xi + xim1) -

1. (0.5 xi + xip1)) + (0. xi -

1. xim1) (-1. (0.5 xi + xim1)^3 -

1. (0.5 xi + xip1)^3)))) +

1/(0. xi - 1. xim1)

1. (-0.5 xi -

1. (0.5 xi +

xim1)) ((-1. (1.09091 + 0. (0.5 xi + xim1)) (-0.5 xi^2 +

1. (0.5 xi + xim1)^2) + (0. xi -

1. xim1) (0. (0.5 xi + xim1)^2 +

2. (0.0454545 (-0.5 xi - 0.5 xim1) +

0.0454545 (0.5 xi + 0.5 xip1))))/(-0.25 xi^3 +

1. xi^2 xim1 + 1. xi xim1^2 +

0. xim1^3) - (1. (-1. ((0. xi - 1. xim1) (-0.5 xi^3 -

1. (0.5 xi + xim1)^3) -

1. (-0.5 xi - 1. (0.5 xi + xim1)) (0.5 xi^3 -

1. (0.5 xi + xim1)^3)) (-1. (1.09091 +

0. (0.5 xi + xim1)) (-0.5 xi^2 +

1. (0.5 xi + xim1)^2) + (0. xi -

1. xim1) (0. (0.5 xi + xim1)^2 +

2. (0.0454545 (-0.5 xi - 0.5 xim1) +

0.0454545 (0.5 xi + 0.5 xip1)))) + (-0.25 xi^3 +

1. xi^2 xim1 + 1. xi xim1^2 +

0. xim1^3) (-1. (1.09091 +

0. (0.5 xi + xim1)) (0.5 xi^3 -

1. (0.5 xi + xim1)^3) + (0. xi -

1. xim1) (0. (0.5 xi + xim1)^3 +

3. (0.0454545 (0.5 xi + 0.5 xim1)^2 +

0.0454545 (0.5 xi +

0.5 xip1)^2)))) (-1. (-0.5 xi^2 +

1. (0.5 xi + xim1)^2) (-1. (0.5 xi + xim1) -

1. (0.5 xi + xip1)) + (0. xi -

1. xim1) (1. (0.5 xi + xim1)^2 -

1. (0.5 xi + xip1)^2)))/((-0.25 xi^3 + 1. xi^2 xim1 +

1. xi xim1^2 +

0. xim1^3) (-1. ((0. xi - 1. xim1) (-0.5 xi^3 -

1. (0.5 xi + xim1)^3) -

1. (-0.5 xi - 1. (0.5 xi + xim1)) (0.5 xi^3 -

1. (0.5 xi + xim1)^3)) (-1. (-0.5 xi^2 +

1. (0.5 xi + xim1)^2) (-1. (0.5 xi + xim1) -

1. (0.5 xi + xip1)) + (0. xi -

1. xim1) (1. (0.5 xi + xim1)^2 -

1. (0.5 xi + xip1)^2)) + (-0.25 xi^3 +

1. xi^2 xim1 + 1. xi xim1^2 +

0. xim1^3) (-1. (0.5 xi^3 -

1. (0.5 xi + xim1)^3) (-1. (0.5 xi + xim1) -

1. (0.5 xi + xip1)) + (0. xi -

1. xim1) (-1. (0.5 xi + xim1)^3 -

1. (0.5 xi + xip1)^3))))),

C -> -(1. (-1. (1.09091 + 0. (0.5 xi + xim1)) (-0.5 xi^2 +

1. (0.5 xi + xim1)^2) + (0. xi -

1. xim1) (0. (0.5 xi + xim1)^2 +

2. (0.0454545 (-0.5 xi - 0.5 xim1) +

0.0454545 (0.5 xi + 0.5 xip1)))))/(-0.25 xi^3 +

1. xi^2 xim1 + 1. xi xim1^2 +

0. xim1^3) + (1. (-1. ((0. xi - 1. xim1) (-0.5 xi^3 -

1. (0.5 xi + xim1)^3) -

1. (-0.5 xi - 1. (0.5 xi + xim1)) (0.5 xi^3 -

1. (0.5 xi + xim1)^3)) (-1. (1.09091 +

0. (0.5 xi + xim1)) (-0.5 xi^2 +

1. (0.5 xi + xim1)^2) + (0. xi -

1. xim1) (0. (0.5 xi + xim1)^2 +

2. (0.0454545 (-0.5 xi - 0.5 xim1) +

0.0454545 (0.5 xi + 0.5 xip1)))) + (-0.25 xi^3 +

1. xi^2 xim1 + 1. xi xim1^2 +

0. xim1^3) (-1. (1.09091 +

0. (0.5 xi + xim1)) (0.5 xi^3 -

1. (0.5 xi + xim1)^3) + (0. xi -

1. xim1) (0. (0.5 xi + xim1)^3 +

3. (0.0454545 (0.5 xi + 0.5 xim1)^2 +

0.0454545 (0.5 xi +

0.5 xip1)^2)))) (-1. (-0.5 xi^2 +

1. (0.5 xi + xim1)^2) (-1. (0.5 xi + xim1) -

1. (0.5 xi + xip1)) + (0. xi -

1. xim1) (1. (0.5 xi + xim1)^2 -

1. (0.5 xi + xip1)^2)))/((-0.25 xi^3 + 1. xi^2 xim1 +

1. xi xim1^2 +

0. xim1^3) (-1. ((0. xi - 1. xim1) (-0.5 xi^3 -

1. (0.5 xi + xim1)^3) -

1. (-0.5 xi - 1. (0.5 xi + xim1)) (0.5 xi^3 -

1. (0.5 xi + xim1)^3)) (-1. (-0.5 xi^2 +

1. (0.5 xi + xim1)^2) (-1. (0.5 xi + xim1) -

1. (0.5 xi + xip1)) + (0. xi -

1. xim1) (1. (0.5 xi + xim1)^2 -

1. (0.5 xi + xip1)^2)) + (-0.25 xi^3 + 1. xi^2 xim1 +

1. xi xim1^2 +

0. xim1^3) (-1. (0.5 xi^3 -

1. (0.5 xi + xim1)^3) (-1. (0.5 xi + xim1) -

1. (0.5 xi + xip1)) + (0. xi -

1. xim1) (-1. (0.5 xi + xim1)^3 -

1. (0.5 xi + xip1)^3)))),

D -> -(1. (-1. ((0. xi - 1. xim1) (-0.5 xi^3 -

1. (0.5 xi + xim1)^3) -

1. (-0.5 xi - 1. (0.5 xi + xim1)) (0.5 xi^3 -

1. (0.5 xi + xim1)^3)) (-1. (1.09091 +

0. (0.5 xi + xim1)) (-0.5 xi^2 +

1. (0.5 xi + xim1)^2) + (0. xi -

1. xim1) (0. (0.5 xi + xim1)^2 +

2. (0.0454545 (-0.5 xi - 0.5 xim1) +

0.0454545 (0.5 xi + 0.5 xip1)))) + (-0.25 xi^3 +

1. xi^2 xim1 + 1. xi xim1^2 +

0. xim1^3) (-1. (1.09091 +

0. (0.5 xi + xim1)) (0.5 xi^3 -

1. (0.5 xi + xim1)^3) + (0. xi -

1. xim1) (0. (0.5 xi + xim1)^3 +

3. (0.0454545 (0.5 xi + 0.5 xim1)^2 +

0.0454545 (0.5 xi + 0.5 xip1)^2)))))/(-1. ((0. xi -

1. xim1) (-0.5 xi^3 - 1. (0.5 xi + xim1)^3) -

1. (-0.5 xi - 1. (0.5 xi + xim1)) (0.5 xi^3 -

1. (0.5 xi + xim1)^3)) (-1. (-0.5 xi^2 +

1. (0.5 xi + xim1)^2) (-1. (0.5 xi + xim1) -

1. (0.5 xi + xip1)) + (0. xi -

1. xim1) (1. (0.5 xi + xim1)^2 -

1. (0.5 xi + xip1)^2)) + (-0.25 xi^3 + 1. xi^2 xim1 +

1. xi xim1^2 +

0. xim1^3) (-1. (0.5 xi^3 -

1. (0.5 xi + xim1)^3) (-1. (0.5 xi + xim1) -

1. (0.5 xi + xip1)) + (0. xi -

1. xim1) (-1. (0.5 xi + xim1)^3 -

1. (0.5 xi + xip1)^3)))}}，

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题目A. Square Counting 简单数学题目大意题解代码B. Quality vs Quantity 排序题目大意题解代码C. Factorials and Powers of Two 状态压缩dp+位运算题目大意题解代码D. Weight the Tree 树形dp+dfs题目大意题解代码E. Power Board 看起来像是数论？许多年没打cf了，偶尔打了一盘，恢复紫名了。A. S