3y-1/2=1/3 x-8=2x+7 2x=5x-1 9-10x=9x-10 4/5x=5x-21
来源:学生作业帮 编辑:百度作业网作业帮 分类:数学作业 时间:2024/06/28 06:09:04
3y-1/2=1/3 x-8=2x+7 2x=5x-1 9-10x=9x-10 4/5x=5x-21
解方程得窍门:把未知数一边的通过4则运算化简最后剩下未知数,即可求得方程.
(1)3y-1/2=1/3
3y=1/3 +1/2
3y=5/6
y=5/18
(2)x-8=2x+7
x=2x+7+8
x=2x+15
0=x+15
x=-15
(3)2x=5x-1
0=3x-1
3x=1
x=1/3
(4)9-10x=9x-10
9=19x-10
19=19x
x=1
(5)4/5x=5x-21
4x=25x-105
105=21x
x=5
(1)3y-1/2=1/3
3y=1/3 +1/2
3y=5/6
y=5/18
(2)x-8=2x+7
x=2x+7+8
x=2x+15
0=x+15
x=-15
(3)2x=5x-1
0=3x-1
3x=1
x=1/3
(4)9-10x=9x-10
9=19x-10
19=19x
x=1
(5)4/5x=5x-21
4x=25x-105
105=21x
x=5
y=(x-1)(x-2)(x-3)(x-4)(x-5)(x-6)(x-7)(x-8)(x-9)(x-10)的导数在x=1
设函数f(x)=(x-1)(x-2)(x-3)(x-4)(x-5)(x-6)(x-7)(x-8)(x-9)(x-10),
1x+2x+3x+4x+5x+6x+7x+8x+9x+10x+11x+12x+13x+14x+15x=550
1x()+2x()+3x()+4x()+5x()+6x()+7x()+8x()加9x()+10x()=1980
1X?+2X?+3X?+4X?+5X?+6X?+7X?+8X?+9X?+10X?=1980求?是多少
|X-1|+|X-2|+|X-3|+|X-4|+|X-5|+|X-6|+|X-7|+|X-8|+|X-9|+|X-10|
(1) x-3/x-2 - x-5/x-4=x-7/x-6 - x-9/x-8
x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少?
x^5+x^4 = (x^3-x)(x^2+x+1)+x^2+x
求函数y=\x-1\+\x-2\+\x-3\+\x-4\+\x-5\+\x-6\+.+\x-10\的最小值
若2x-3y+4=0则x(x*x-1)+x(5-x*x)-6y+7
已知x=9/2 求:[(x^+7x+10)/(x^2+6x+5)]×[(x^3+1)/(x^2