已知方程3m-2(1-2X)
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4x+2m-1=3x∴x=1-2m3x+6m=6x+3∴3x=6m-3∴x=2m-1∴1-2m=2m-1∴m=1/2
1)将x=1带入,1-(2m+1)+3m+2-m-2=0成立,所以可以证明.2)因为知道x=1是方程的根,原式可写成(x-1)(ax^2+bx+c)=0{1}拆项并合并同类项,可得ax^3+(b-a)
x=1-2m,x=1/3(2m-1)1-2m=1/3(2m-1)m=1/2
4X+3M=3X+1的解为:x=1-3m3X+2M=6X+1的解为:(2m-1)/3所以1-3m=(2m-1)/3所以m=4/11
4x+2m=3x+14x-3x=1-2mx=1-2m3m+2m=5x+45m-4=5xx=(5m-4)/5∴1-2m=(5m-4)/55-10m=5m-45+4=5m+10m15m=9m=-3/5
/>将原点(0,0)代人MX²-(3m-1)x+2m-2=0中即2m-2=0 得m=1再把m=1代人MX²-(3m-1)x+2m-2=0中得出解析式X²-2x=
1.4x+2m-1=3x3x+2m=6x+14x-3x=1-2m3(1-2m)+2m=6(1-2m)+1x=1-2m3-6m+2m=6-12m+1-6m+2m+12m=1-316m=-2m=-2/16
1.∵4x+2m=3x+1∴x=1-2m∵3x+2m=6x+1∴x=1-2m/-3又∵方程4x+2m=3x+1和方程3x+2m=6x+1的解相同∴1-2m=1-2m/-3m=0.52.若x=0,m=0
3X+2M=3X+3X+12M=3X+15X+3X+1=3X-75X=-8X=-1.6M=3x(-1.6)+1=-3.8
-3,-1,根号2
由第一个方程得:x=1-2m;由第二个方程得:x=2m-13由题意得:1-2m=2m-13解得:m=12.故填:12.
5x+2m=3x-75x-3x=-2m-72x=-2m-7x=-m-3.53x+2m=6x+13x=2m-1x=(2m-1)/3因为两个解相同.所以-m-3.5=(2m-1)/3两边乘以3得-3m-1
m=-19/10再问:我需要过程!再答:等下再答:第一个式子2x=-7-2mx=-2/7-m第二个:-3x=1-2mx=-1/3+2/3m-7/2-m=-1/3+2/3m解得:m=-19/10再问:o
∵sinQ+cosQ=(√3+1)/2sibQcosQ=m/2∴1+2xm/2=(√3+2)/2∴m=√3/2原式=(sin²Q-cos²Q)/(sinQ+COSQ)=sinQ-c
x^3-(2m+1)x^2+(3m+2)x-m-2=(x^3-x^2)-(2mx^2-2mx)+[(m+2)x-(m+2)]=x^2(x-1)-2mx(x-1)+(m+2)(x-1)=(x-1)(x^
(1)原式=(2x+y+4)+m(x-2y-3)=0令2x+y+4=0x-2y-3=0得:x=-1y=-2即该直线一定过点(-1,-2)(2)设该直线方程为y+2=k(x+1)(k
4x+2m=3x+1x=1-2m代入3x+2m=6x+1得:2m=3x+1=3(1-2m)+1=4-6m8m=4m=1/2
1)将x=1带入,1-(2m+1)+3m+2-m-2=0成立,所以可以证明.2)因为知道x=1是方程的根,原式可写成(x-1)(ax^2+bx+c)=0{1}拆项并合并同类项,可得ax^3+(b-a)
4X+2M=3X+13X+2M=5X+24X-3X=1-2M3X-5X=2-2MX=1-2M-2X=2-2MX=(2-2M)/(-2)1-2M=(2-2M)/(-2)两边乘以-2得:-2+4M=2-2
1-2M=(2M-1)/3=>M=1/2