2 1 -5 8 1 -3 0 9 0 2 -1 -5 1 4 -7 0 答案等于27,2 1 -5 81 -3 0 90 2 -1 -51 4 -7 0

来源：学生作业帮助网编辑：作业帮时间：2024/05/09 15:43:48

2 1 -5 8 1 -3 0 9 0 2 -1 -5 1 4 -7 0 答案等于27,2 1 -5 81 -3 0 90 2 -1 -51 4 -7 0
2 1 -5 8 1 -3 0 9 0 2 -1 -5 1 4 -7 0 答案等于27,
2 1 -5 8
1 -3 0 9
0 2 -1 -5
1 4 -7 0

2 1 -5 8 1 -3 0 9 0 2 -1 -5 1 4 -7 0 答案等于27,2 1 -5 81 -3 0 90 2 -1 -51 4 -7 0
r1-2r2,r4-r2
0 7 -5 -10
1 -3 0 9
0 2 -1 -5
0 7 -7 -9
r4-r1,r1-3r3
0 1 -2 5
1 -3 0 9
0 2 -1 -5
0 0 -2 1
r3-2r1
0 1 -2 5
1 -3 0 9
0 0 3 -15
0 0 -2 1
r4+(2/3)r3
0 1 -2 5
1 -3 0 9
0 0 3 -15
0 0 0 -9
交换1,2行后为上三角
行列式 = 27

行②＊(－2)加到行①，行④＊(－1)加到行②得－＞|0,7,-5,-10;0,-7,7,9;0,2,-1,-5;1,4,-7,0|再按第四刚展开化成三阶行列式－＞-|7,-5,-10;-7,7,9;2,-1,-5|再行②加到刚①，行③×（7/2）加到行②得－＞-|0,2,-1;0,7/2,-17/2;2,-1,-5|按第三行展开得二阶行列式得－＞-2|2,-1;7/2,-17/2|计算得27...

全部展开

收起

8 0 0 0 3 0 0 0 0 0 0 3 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 7 0 5 0 0 6 0 0 1 0 0 0 4 9 0 0 0 5 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 7 0 9 0 0 5 0 0 2 4 0 8 0 0 0 0 0 [ ][ ]2[ ]-------------------[ ][ ]9 [ ]1 8[ ]--------------[ ] 0 5[ ][ ][ ]-------------0 2道数独题目,在线等,急7 4 0 0 6 5 0 1 09 0 0 0 0 0 0 6 00 0 3 9 0 4 0 0 02 0 0 0 0 0 0 4 06 0 4 0 0 0 1 0 70 9 0 0 0 0 0 0 30 0 0 3 0 5 6 0 00 1 0 0 0 0 0 0 80 7 0 0 2 8 0 5 10 0 0 0 3 0 0 7 43 0 0 0 0 0 5 9 00 0 0 8 0 9 0 0 20 7 0 5 0 0 9 3+1+5+6+9 1+8+2+0+3 4+1+8+3+9 英语翻译#include int map[9][9]={0,0,3,8,1,0,0,0,9,5,0,0,4,0,0,0,8,0,0,6,0,9,0,0,1,0,0,0,0,8,0,3,0,0,0,6,0,0,0,0,0,0,0,0,0,9,0,0,6,0,0,5,0,0,0,0,6,0,0,9,0,1,0,0,1,0,0,0,5,0,0,4,2,0,0,0,4,8,7,0,0}; void display() { int i; int j; for(i=0;i 81方格如何填写0 0 4 0 9 0 8 0 0 0 3 0 5 0 0 0 0 4 0 9 5 4 0 0 3 0 0 7 0 0 2 0 0 0 8 1 4 8 0 0 5 0 0 0 0 0 0 6 1 0 0 0 0 0 5 0 0 0 2 7 1 0 0 1 0 8 0 0 0 0 0 6 0 6 0 0 0 0 9 0 0 请在“0”处填写1-9数字让小的九方格和大的九方格计算五阶行列式|4 8 6 0 9| |1 -1 3 0 2| |0 4 1 -2 3| |5 -3 0 0 0| |2 0 0 0 0|.|4 8 6 0 9| |1 -1 3 0 2| |0 4 1 -2 3| |5 -3 0 0 0| |2 0 0 0 0| 1+2-3+4+5-9+8+7-0+21 用降阶法求四阶行列式 2 1 -5 8,1 -3 0 9,0 2 -1 -5 ,1 4 -7 0 . 行列式[2 1 -5 8 1 -3 0 9 0 2 -1 -5 1 4 -7 0] 怎么求 .追问2 1 -5 8 1 -3 0 9 0 2 -1 -5 1 4 -7 0 行列式怎么求 1+1+1+1++5+5++8+5+6+3+27++8+0+6+6+2+7+8+5+9+9+9+9-9+8+5+5+51+6+5+8+5+95+8+8+9+9+8= 请帮我算下这个数独的答案,{4,2,0,0,9,0,0,0,0}{5,0,7,3,0,0,0,0,0}{0,8,0,0,7,0,0,5,4}{6,7,0,5,0,0,0,0,1}{0,0,0,0,0,0,0,0,0}{2,0,0,0,0,6,0,9,3}{7,6,0,0,2,0,0,3,0}{0,0,0,0,0,7,8,0,2}{0,0,0,0,4,0,0,1,6} 0 4 5 5 1 ,5 8 3 9 ,0 6 5,5 2 0什么意思? -9+-8+-7+-6+-5+-4+-3+-2+-1+0+1+2+3+4+5+.+2009 数独九宫格计算,一下0代表是要填入的数字0 0 0 0 0 9 5 4 00 0 2 0 0 0 9 7 69 0 0 7 0 5 0 0 0 0 0 0 0 0 7 0 2 03 0 0 0 0 0 0 0 82 4 0 1 0 0 0 0 00 0 0 3 0 6 0 0 51 2 0 0 0 0 3 0 0 0 9 3 8 0 0 0 0 0 每行每列都是1-9数字不能重 81格从1到9,横竖不重复0代表未知8 0 0 0 0 0 0 0 0 0 0 3 6 0 0 0 0 00 7 0 0 9 0 2 0 00 5 0 0 0 7 0 0 00 0 0 0 4 5 7 0 00 0 0 1 0 0 0 3 00 0 1 0 0 0 0 6 80 0 8 5 0 0 0 1 00 9 0 0 0 0 4 0 0 15 15 0 20 20 0 0 0 15 0 20 0 15 0 20 0 把 8 4 6 4 5 2 3 9 1 2 快点!