若关于x的方程x2-x分之x-1-3x分之1 3x-6分之k有增根
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6分之1-2x+3分之x+1=1-4分之2x+1两边乘122-4x+4x+4=12-6x-36x=3x=1/2代入x+3分之6x-a=6分之a-3x1/2+(3-a)/3=(a-3/2)/61/2+1
(1)x+m/x=c+m/c∴x=c或x=m/c(2)y+2/(y-1)=A+2/(A-1)∴(y-1)+2/(y-1)=(A-1)+2/(A-1)∴(y-1)²-[(A-1)+2/(A-1
(x的平方-X)分之一+(x的平方+x)分之K-5=(x的平方-1)分之K-1x+1+(k-5)(x-1)=x(k-1)x+1+kx-5x-k+5=kx-x-4x-k+6+x=0-3x-k+6=0k=
∵x=2是方程3a-x=x2+3的解,∴3a-2=1+3解得:a=2,∴原式=a2-2a+1=22-2×2+1=1.
由于函数f(x)=-x2+2x=-(x-1)2+1≤1,故函数f(x)的值域为(-∞,1].根据已知关于x的方程-x2+2x=|a-1|在x∈(12,2]上恒有实数根,的图象和直线y=|a-1|的图象
x^2-x分之x+1-3x-3分之x+k=3x分之1(x+1)/x(x-1)-(x+k)/3(x-1)=1/3x[3(x+1)-x(x+k)]/3x(x-1)=(x-1)/3x(x-1)3x+3-x&
解(x-1)/(x-5)=m/(10-2x)(x-1)/(x-5)=-m/2(x-5)两边乘以2(x-5)得:2(x-1)=-m∵方程无解∴x=5∴2×(5-1)=-m∴m=-8
X1+X2=-B/A=2X1*X2=C/A=1/2求得X1=1+根号2或者X1=1-根号2从而求出X2的值X1/X2+X2/X1=(X1*X1+X2*X2)/(X1X2)=6
(x+1)/(x^2-x)-1/3x=(x+k)/(3x-3)两边乘3x(x-1)3(x+1)-(x-1)=x(x+k)x^2+kx=2x+4增根就是分母为0所以x^2-x=0,3x=0,3x-3=0
答:问题修正后——x-1分之1+x-2分之m=(x-1)(x-2)分之2(m+1)1/(x-1)+m/(x-2)=2(m+1)/[(x-1)(x-2)][(x-2)+m(x-1)]/[(x-1)(x-
将方程x+[2/(x-1)]=A+[2/(A-1)]的两边都减1,得:x-1+[2/(x-1)]=A-1+[2/(A-1)]∴x-1=A-1,或x-1=2/(A-1)∴x=A,或x=(A+1)/(A-
3a+7b=4b-33a+3b=-3a+b=-1
x²+2x+1=10(x+1)²=10x+1=3或x+1=-3所以x=2或x=-4【(x²+4)/x-4】÷【(x²-4)/(x²+2x)】=【(x&
规律:解为X1=c;X2=m/c下面的方程,在等号两边同时-1,则令y=(x-1),c=(a-1);由上面的规律的的,y1=c,y2=2/c;带入x即可
x+2/x=c+2/c~x1=c,x2=2/c;x+2/(x-1)=a+2/(a-1);(x-1)+2/(x-1)=(a-1)+2/(a-1);x1-1=a-1;x2-1=2/(a-1);x1=a;x
你把等式两边都减1,不就和那题设一样了吗?所以X1=A,X2=(A+1)/(A-1)
原方程变形为(x+ax)2-7(x+ax)+12=0,(x+ax-3)(x+ax-4)=0,x+ax=3或x+ax=4则x2-3x+a=0或x2-4x+a=0,对于x2-3x+a=0,△=9-4a=0
把x=-2代入方程,得-2=-1-a,解得:a=1,∴a100-1a100=1-1=0.故填0.
这是七年级下册的分式方程.1.去分母:两边同时乘X*(X-2)得X²+4-X²=a*(X-2)2.去括号,合并同类项得aX=2a+43.系数化为一得X=a分之2a+4因为方程无解,
根据题意得k≥0且△=(-3k)2-4×(-1)≥0,解得k≥0.故答案为k≥0.