已知关于x的方程2除以x=m
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![已知关于x的方程2除以x=m](/uploads/image/f/4244815-55-5.jpg?t=%E5%B7%B2%E7%9F%A5%E5%85%B3%E4%BA%8Ex%E7%9A%84%E6%96%B9%E7%A8%8B2%E9%99%A4%E4%BB%A5x%3Dm)
x²+2x+m=0(x+1)²=(1-m)=(m-1)i²(其中,i²=-1)x+1=±(√(m-1))ix=±(√(m-1))i-1又因为|α|+|β|=4,
/>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=
y=(x-5)/(2x+m)求反函数y=(mx+5)/(1-2x)关于直线y=x对称两函数相同m=-1
(2k+m)/3=(1+x-nk)/6====>4k+2m=1+x-nk===>x=(4-n)k+2m-1=1===>(4-n)k+2m=2===>n=4,m=1
∵sinQ+cosQ=(√3+1)/2sibQcosQ=m/2∴1+2xm/2=(√3+2)/2∴m=√3/2原式=(sin²Q-cos²Q)/(sinQ+COSQ)=sinQ-c
判别式=[2(2-m)]²-4(3-6m)=4[(2-m)²-(3-6m)]=4(m²-4m+4-3+6m)=4(m²+2m+1)=4(m+1)²>=
x+m/3-2x-1/2=m-x-1/2=m-m/3x=-1/2-(2/3)m解为非正数-1/2-(2/3)m
x/(x-2)-2=m^2/(x-3)(4-x)/(x-2)=m^2/(x-3)(4-x)(x-3)/(x-2)(x-3)=m^2(x-2)/(x-3)(x-2)[x^2-(7-m^2)x+12-2m
x/(x+3)-2=m/(m+3)x/(x+3)=2+m/(m+3)=(3m+6)/(m+3)x/3=(3m+6)/(-2m-3)x=-9(m+2)/(2m+3)0m>-1.5orm再问:x/(x+3
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^
方程化为x^2+(2m+1)x+m^2-2=0.(1)方程有两个相等的实根,则判别式为0,即(2m+1)^2-4(m^2-2)=0,解得m=-9/4,此时方程化为x^2-7/2*x+49/16=0,分
(1)证明:△=(m+2)2-4(2m-1)=m2-4m+8=(m-2)2+4,∵(m-2)2≥0,∴(m-2)2+4>0,即△>0,所以方程有两个不相等的实数根;(2)设方程的两个根为x1,x2,由
①1/2-x>x-21/2+2>2x5/2>2xx
x/(x-3)-2=m/(x-3)等式两边同乘x-3,得x-2(x-3)=mx=6-m因为有一个正数根,所以6-m>0m再问:正数根是怎么回事呢再答:正数根是指x>0,即6-m>0
化为整式方程:8x^2+(7-m)x+m-3=0(#)原方程若有增根,必是0,1,-1.把它们分别代入(#),得m=1或3
证明:x²-(m+3)x+(3m-2)=0判别式△=(m+3)²-4(3m-2)=m²+6m+9-12m+8=m²-6m+17=(m-3)²+8>=0
方程判别式△=[-2(m+1)]²-4·4·m=4m²-8m+4=4(m-1)²恒≥0,方程恒有实根.设两根分别为x1,x2,由韦达定理得x1+x2=2(m+1)/4=(
2x²-3x+m+1=0m
x/(x-3)=2-m/(3-x)等式两边同时去分母,可得:x=2x-6+m所以x=6-m又该方程有一个正数解所以x=6-m>0,m