百度作业网0.01 4-6X-6.5=0.02 0.02-4X-7.5
来源：学生作业帮助网 编辑：作业帮 时间：2024/07/18 05:49:45
6.5x-3.8x=272.7x=27x=106x+8x=44814x=448x=323.4x-5.1X4=6.83.4x-20.4=6.83.4x=20.4+6.83.4x=27.2x=8
x(1+2+...+9)=x(9-8-7-...-1)x=0记得采纳啊
2x+3x+4x+5x+x+6x+7x=10028x=100x=100/28x=25/7
6.5x－x=10.55.5x=10.5x=1.90909...
3x*x=1+x得6x*x*x+7x*x-5x+2000=3x^2*2x+7x^2-5x+2000=(1+x)2x+7x^2-5x+2000=9x^2-3x+2000=3(3x^2-x)+2000=3
0.125x+2.75=-1.25x移项（1.25+0.125）x=-2.75x=-2.75/1.375=20.35x-1.5=-2.15x+3.5移项（0.35+2.15）x=1.5+3.52.5x
3.6x-x=6.52.6x=6.5x=26分之65施主,我看你骨骼清奇,器宇轩昂,且有慧根,乃是万中无一的武林奇才.潜心修习,将来必成大器,鄙人有个小小的考验请点击在下答案旁的"选为满意答案"
x/(x-2)=2x/(x-3)+(1-x)/(x-5x+6)x/(x-2)=2x/(x-3)+(1-x)/(x-2)(x-3)x(x-3)/(x-2)(x-3)=2x(x-2)/(x-2)(x-3)
设x1=4-√3,x2=4+√3,是方程X^2-8X+13=0的两根所以X1^2-8X1+15=2X^4-6X^3-2X^2+18X+23=(X+1)^2*(X^2-8X+13)+10=10所以原式=
x=0显然不是根两边同时除以x^2,得：x^2+1/x^2+2(x+1/x)-6=0令t=x+1/x,则x^2+1/x^2=t^2-2代入上式得：t^2-2+2t-6=0得：t^2+2t-8=0(t+
6x+8.3=11.6x=11-8.36x=2.7x=2.7/6x=0.4518-2.5x=5.5-2.5x=5.5-18-2.5x=-12.5x=-12.5÷(-2.5)x=5x+6.5x=1.27
原式=x^4(x+x^2+x^3+x^4)+x^8(x+x^2+x^3+x^4)+.+x^2000(x+x^2+x^3+x^4)=0+0+0+.0=0
∵3x+2y=13,2x-3y=0∴x=3,y=2[(x^2+x-2)/(x^2+4x+4)]÷[(x^2+2x-3)/(x^2-4)]×[(x^2+6x+9)/(x^2-xy-2x+2y)]=[(x
y1=2x-x^2=-(x-1)^2+1,这个的取值范围为什么是-3≤y1≤1;而不是-3≤y1≤0呢?作图知y1函数的开口向下,当x=1时,有最大数y1=1
(X-5)(X-6)=X-5则(x-5)(x-6)-(x-5)=0则(x-5)(x-6-1)=0则(x-5)(x-7)=0所以x=5或x=7
(X-4)/(X-5)-(X-5)/(X-6)=(X-7)/(X-8)-(X-8)/(X-9)[(x-4)(x-6)-(x-5)2]/(x-5)(x-6)=[(x-7)(x-9)-(x-8)2]/(x
y=3（x—97.35）+80.85当x=97.35时,y取得最小值80.85.
2.2x-x=0.31.2x=0.3x=0.3/1.2x=1/4=0.25
intx=6;x+=(x-=x*x);等价于：x=(x+=(6-(6*6)))=(x+=-30)=-60;再问：(x-=x*x)为什么是同时赋值6再答：因为有个等号，所以需要先保存x=6，再计算x*x