⊂4.5 x⊃×2=13解方乘
来源:学生作业帮助网 编辑:作业帮 时间:2024/10/06 20:03:30
1x+2x+3x+4x+5x+6x+7x+8x+9x+10x+11x+12x+13x+14x+15x=550120x=550x=55/12=4.583
6x^3+7x^2-13x+11=6x^3+3x^2-15x+4x^2+2x-10+21=3x(2x*x+x-5)+2(2x*x+x-5)+21=3x*0+2*0+21=21
x-2/13x=11/24,11/13x=11/24,x=13/241又7/9x-x=5/21,7/9x=5/21,x=15/49x÷(3/4+5/6)=3/10,x=3/10,x(3/4+5/6)=
原式=x^4-8x^3+13x^2+10+2x(x^2-8x+13)+(x^2-8x+13)=x^2(x^2-8x+13)+10=10分组代入后得10
(4.5-x)*7=17.54.5*7-7x=17.54.5*7-17.5=7x7x=14x=2(5.5-1.3)x=12.64.2x=12.6x=30.8x=10.5-0.5*130.8x=4x=5
每个绝对值里都是正数所以原式=x+1+x+3+x+5+……+x+13-x-2-x-4-x-6-……-x-12=x-1*6+13=x+7=π/2+7
1/4X=13X=5210/3X=20/21X=2/70.72X=12.96X=18
(X(13-X)(X+(13-X)))/(X+1)=42得分母是X^2(13-X)+(13-X)X分子是(X+1)再得分母X(13-X)(X+1)分子分母抵消的(X+1)X=42得X=6
是5x乘(2x-3.3),还是5乘(2x-3.3),是5x乘(x+1.2),还是5乘(x+1.2)13x-5(2x-3.3)=2413x-10x+16.5=243x=24-16.53x=7.5x=2.
(13x-x^2)/(x+1)*[x+(13-x)/(x+1)]=42设(13-x)/(x+1)=y.xy*(x+y)=426*7=42y=6x=1
y=x+11+x-12+x+13=3x+12≥48最小值是25此时x=-11
x+17=3(x+13),x+17=3x+39x-3x=39-17-2x=22x=22/-2x=-112x-11.2=0.6x,2x-0.6x=11.21.4x=11.2x=11.2/1.4x=82.
13x-8x-20=2x+223x=42x=14
1/2x^2-1/4x+0.2x^3+0.25x-0.5x^2-1/5x^3+0.5x-1=(1/2x^2-0.5x^2)+(0.25x-1/4x)+(0.2x^3-1/5x^3)+0.5x-1=0.
4.5x-2(x-5)=134.5x-2x+10=132.5x=3x=1.2
图片回答 请追问下再问:哦再答:
2x+0.4x=48(2+0.4)x=48x=48/2.4x=20(并检验)2×20+0.4×20=40+8=488x-x=14.7(8-1)x=14.7x=14.7/7x=2.135x+13x=9.
再问:看不清耶再答:我重拍再问:我采纳再答: 再答:不是说采纳的么再答:棒
7+4x=-2x+136x=13-76x=6x=1再问:过程能够再详细一点吗?再答:已经比较详细了。再详细如下:7+4x=-2x+134x+2x=13-76x=6x=1