若X1-X5满足下列方程组2乘X1 +X2+X3+X4+X5=6X1+ 2乘X2 +X3+X4+X5=12X1+X2+ 2乘X3 +X4+X5=24X1+X2+X3+ 2乘X4 +X5=48X1+X2+X3+X4+ 2乘X5 =96求3乘X4+X5的值.

来源:学生作业帮助网 编辑:六六作业网 时间:2024/12/22 23:07:45
若X1-X5满足下列方程组2乘X1+X2+X3+X4+X5=6X1+2乘X2+X3+X4+X5=12X1+X2+2乘X3+X4+X5=24X1+X2+X3+2乘X4+X5=48X1+X2+X3+X4+

若X1-X5满足下列方程组2乘X1 +X2+X3+X4+X5=6X1+ 2乘X2 +X3+X4+X5=12X1+X2+ 2乘X3 +X4+X5=24X1+X2+X3+ 2乘X4 +X5=48X1+X2+X3+X4+ 2乘X5 =96求3乘X4+X5的值.
若X1-X5满足下列方程组
2乘X1 +X2+X3+X4+X5=6
X1+ 2乘X2 +X3+X4+X5=12
X1+X2+ 2乘X3 +X4+X5=24
X1+X2+X3+ 2乘X4 +X5=48
X1+X2+X3+X4+ 2乘X5 =96
求3乘X4+X5的值.

若X1-X5满足下列方程组2乘X1 +X2+X3+X4+X5=6X1+ 2乘X2 +X3+X4+X5=12X1+X2+ 2乘X3 +X4+X5=24X1+X2+X3+ 2乘X4 +X5=48X1+X2+X3+X4+ 2乘X5 =96求3乘X4+X5的值.
五式相加,得:
X1+X2+X3+X4+X5=31
x4=48-31=17
x5=96-31=65
3乘X4+X5
=3*17+65
=116.

6(X1++++X5) = 6+12+24+48+96 =186
X1+X2++++X5 = 31
X1=-25
X2=-19
X3=-7
X4=17
X5=65

简单:
2乘X1 +X2+X3+X4+X5=6 (1)
X1+ 2乘X2 +X3+X4+X5=12 (2)
X1+X2+ 2乘X3 +X4+X5=24 (3)
X1+X2+X3+ 2乘X4 +X5=48 (4)
X1+X2+X3+X4+ 2乘X5 =96 (5)
将上面的5项式子全部相加:
6(X1+X2+X3+X4+ X5 )...

全部展开

简单:
2乘X1 +X2+X3+X4+X5=6 (1)
X1+ 2乘X2 +X3+X4+X5=12 (2)
X1+X2+ 2乘X3 +X4+X5=24 (3)
X1+X2+X3+ 2乘X4 +X5=48 (4)
X1+X2+X3+X4+ 2乘X5 =96 (5)
将上面的5项式子全部相加:
6(X1+X2+X3+X4+ X5 )=6+12+24+48+96
X1+X2+X3+X4+ X5 =1+2+4+8+16=31 ---(6)
(4)-(6)
x4=17
(5)-(6)
x5=65
所以:3乘X4+X5的=3*17+65=116

收起

2乘X1 +X2+X3+X4+X5=6 , (1)
X1+ 2乘X2 +X3+X4+X5=12 , (2)
X1+X2+ 2乘X3 +X4+X5=24 , (3)
X1+X2+X3+ 2乘X4 +X5=48 , (4)
X1+X2+X3+X4+ 2乘X5 =96 , (5)
(1)+(2)+...+(6): 6(x1+x2+x3+x4+x5)=6+12+...

全部展开

2乘X1 +X2+X3+X4+X5=6 , (1)
X1+ 2乘X2 +X3+X4+X5=12 , (2)
X1+X2+ 2乘X3 +X4+X5=24 , (3)
X1+X2+X3+ 2乘X4 +X5=48 , (4)
X1+X2+X3+X4+ 2乘X5 =96 , (5)
(1)+(2)+...+(6): 6(x1+x2+x3+x4+x5)=6+12+24+48+96=186
x1+x2+x3+x4+x5=186/6=31, (6)
(1)-(6): x1=6-31=-25;
(2)-(6): x2=12-31=-19,
(3)-(6): x3=24-31=-7
(4)-(6): x4=48-31=17
(5)-(6): x5=96-31=65

收起

若X1~X5满足下列方程组:2乘X1+X2+X3+X4+X5=6,X1+2乘X2+X3+X4+X5=12,X1+X2+2乘X 若X1-X5满足下列方程组2乘X1 +X2+X3+X4+X5=6X1+ 2乘X2 +X3+X4+X5=12X1+X2+ 2乘X3 +X4+X5=24X1+X2+X3+ 2乘X4 +X5=48X1+X2+X3+X4+ 2乘X5 =96求3乘X4+X5的值. 5.若x1、x2、x3、x4、x5满足下列方程组:若x1、x2、x3、x4、x5满足下列方程组:2x1+x2+x3+x4+x5=6,x1+2x2+x3+x4+x5=12,x1+x2+2x3+x4+x5=24,x1+x2+x3+2x4+x5=48,x1+x2+x3+x4+2x5=96 则3x4+2x5的值是多少?{凡是X后的均位数的读 关于二元一次方程组若X1,X2,X3,X4,X5满足下列方程组:2X1+X2+X3+X4+X5=6X1+2X2+X3+X4+X5=12X1+X2+2X3+X4+X5=24X1+X2+X3+2X4+X5=48X1+X2+X3+X4+2X5=96则3X4+2X5的值是 多少?(X1,X2.X3.X4.X5的1.2.3.4.5不是乘除和加减,带表5个不同的 若X1,X2,X3,X4,X5 满足方程组:2X1+X2+X3+X4+X5=6,①X1+2X2+X3+X4+X5=12 ②X1+X2+2X3+X4+X5=24 ③X1+X2+X3+2X4+X5=48 ④X1+X2+X3+X4+2X5=96 ⑤⑴求X1+X2+X3+X4+X5的值;⑵求3X3+2X4-X5有必要说明一下,凡是跟在X后面的数字都是小 x1-x2+x3=1x2-x3+x4=21若x1,x2,x3,x4,x5满足方程组 x3-x4+x5=3x4-x5+x1=4x5-x1+x2=5求x2 x3 x4的值2已知 x1+x4+x6+x7=39 x2+x4+x5+x7=49 x3+x5+x6+x7=41 x4+x7=13 x5+x7=14 x6+x7=9 x1+x2+x3+x4+x5+x6+x7=9求x7的值若x1,x2,x3,x4,x5满足方程组 x1-x 若x1,x2,x3,x4,x5满足方程组:x1-x2+x3=1 x2-x3+x4=2 x3-x4+x5=3 x4-x5+x1=4 x5-x1+x2=5 求x2,x3,x4的少打了个字,是求x2,x3,x4的值 2x1+x2+x3+x4+x5=6 x1+2x2+x3+x4+x5=12 x1+x2+2x3+x4+x5=24 x1+x2+x3+2x4+x5=48 x1+x2+x3+x4+2x5=96x后面的数字是角标多元一次方程组,五个未知数都要求出来, 解一道方程组x1+x2+x3=5,x2+x3+x4=1,x3+x4+x5=-5,x4+x5+x1=-3,x5+x1+x2=2 帮我想一道初中的竞赛题,x*2表示X的平方,若X1.X2,X3,X4,X5为互不相等的正奇数,满足(2005-X1)(2005-X2)(2005-X3)(2005-X4)(2005-X5)=24*2那么,X1*2+X2*2+X3*2+X4*2+X5*2的末尾数字是多少 解方程组:x1+x2+x3+x4+x5=7 3x1+2x2+x3+x4-3x5=-2 x2+2x3+2x4+6x5=23 5x1+4x2-3x3+3x4-x5=10 matlab 求解非线性约束方程f(x)min=0.785*x3*((x1-0.03*x1*x5-x2)^2-(x6+10+0.03*x1*x5)^2*10-(x4)^2)+0.97*x1*x3*x5 %目标函数g1(x)=0.45-x5 若x1,x2│x1-x2│x2/x1+x1/x2是方程2x²;+5x-3=0的两个根,求下列值 │x1-x2│;x2/x1+x/x2; x1³+x2³ 若x1,x2都满足条件|2x-1|+|2x+3|=4,且x1 若X1.X2都满足条件|2X-1|+|2X+3|=4,且X1 有理数x1,x2,x3,x4,x5满足方程组:x1+x2+x3=a1x2+x3+x4=a2x3+x4+x5=a3x4+x5+x1=a4x5+x1+x2=a5其中a1,a2,a3,a4,a5,是常数,并且a1>a2>a3>a4>a5,试比较x1,x2,x3,x4,x5,这五个数的大小关系式. 求下列齐次方程组的一个基础解系,并写出通解x1+2x2-2x3+2x4-x5=0x1+2x2-x3+3x4-2x5=02x1+4x2-7x3+x4+x5=0 求下列齐次方程组的一个基础解系,并写出通解x1+2x2-2x3+2x4-x5=0x1+2x2-x3+3x4-2x5=02x1+4x2-7x3+x4+x5=0