x÷6-2.5=1.1
来源:学生作业帮助网 编辑:作业帮 时间:2024/09/30 09:31:55
6x+8*2.5x=3126x+20x=31226x=312x=312÷26x=12不懂可追问,有帮助请采纳,谢谢!
(1)(x+6)/(x^2+2x+1)-(x+4)/(x^2+x)=0(x+6)/(x+1)²-(x+4)/[x(x+1)]=0都乘以x(x+1)²得,x(x+6)-(x+4)(x
(x+1)(x²-x+1)+6x³÷(-2x²)+(-x^6)÷x^4,=x³+1-3x-x^2,=x^3-x^2-3x+1=-8-4+6+1=-5
1、y=[(x+3)²/(x+3)(x-3)]×[x(x-3)/(x+3)]-x+3=[(x+3)/(x-3)]×[x(x-3)/(x+3)]-x+3=x-x+3=3∴无论x取何值,y的值均
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注意:本题x=2时题目没意义,应该舍去(这是很多学生错误所在)这里x只能取根号2-1
原式=2x(x-2)/(x+2)×x(x+2)/(x-2)²×3(x-2)/x=6x当x=√3/2时原式=3√3
x+0.3=1.8x=1.8-0.3x=1.5x-1.5=4x=4+1.5x=5.55x=1.5x=1.5/5x=0.3x÷1.1=3x=1.1*3x=3.33+x=5.4x=5.4-3x=2.4x-
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=
分子分母可以化简的,十字相乘法学过吗?
15X-2.5=11.515X=11.5+2.515X=14X=14/15;3(x+2)=39X+2=39/3X+2=13X=13-2X=11x-(3/5)x=6/5(5/5-3/5)x=6/5(2/
2.5x-2=02.5x=2x=2÷2.5x=0.86x-2=136x=15x=2.58x-3=38x=6x=3/47x=3x+214x=21x=21/45x-5.4=1.15x=6.5x=1.3x-
2x-6/4-4x+x^2÷x-3/x-2=-2x-7/2+x-3/x=-x-3/x-7/2=1+3-7/21/2
1/(x+1)-[(3-x)/(x^2-6x+9)]÷[(x^2+x)/(x-3)]=1/(x+1)+[(x-3)/(x-3)^2][(x-3)/(x^2+x)]=1/(x+1)+1/(x^2+x)=
原式=2(x-3)/(x-2)²×1/(x+3)×(x-2)(x+3)/[-(x-3)]=-2/(x-2)当x=-1/2时原式=-2/(-5/2)=4/5
两边同时除以6^x,则(4/6)^x+(6/6)^x>(9/6)^x(2/3)^x+1>(3/2)^x,令(2/3)^x=y且y>0y+1>1/yy^2+y-1>0因为y>0,解得y>[5^(1/2)
2.5x+1=6x-131+13=6x-2.5x14=3.5x3.5x=14x=4
x÷2+x÷5+x÷6=1066可以写作x/2+x/5+x/6=1066则方程两边同时乘以30得,15x+6x+5x=31980,26x=31980,x=1230再问:不明白再问:为什么两边同时乘以3
x²-3x=2x+14x²-5x=14∴﹙4x³-6x²+2x﹚/2x-﹙x+1﹚²+1=2x²-3x+1-x²-2x-1+1=x
1.两边乘X(X-2)X=3(X-2)X=3X-6X=3分式方程要检验经检验,X=3是方程的解2.原式=[-(X-3)²/(X+3)(X-3)]÷[2(X-3)/X(X+3)]=[-(X-3