x的平方除以2倍x的平方等于多少个
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![x的平方除以2倍x的平方等于多少个](/uploads/image/f/905398-70-8.jpg?t=x%E7%9A%84%E5%B9%B3%E6%96%B9%E9%99%A4%E4%BB%A52%E5%80%8Dx%E7%9A%84%E5%B9%B3%E6%96%B9%E7%AD%89%E4%BA%8E%E5%A4%9A%E5%B0%91%E4%B8%AA)
画图像,y=(2x-x)²,y=2/x根是他们图像的交点正根是在x轴右侧的交点,应该只有一个,不信你画画
[(1/4x)^2+x]÷(1/2-x)=(1/16x^2+x)×(2-1/x)=1/8x^2-1/16x+2x-1=16×(1/8x^2-1/16x+2x-1)=2x^2-x+32x-16=2x^2
(2根号3)^2-x^2=(4-x)^212-x^2=16-8x+x^2x^2-4x=-2(x-2)^2=2x-2=±根号2x=2±根号2
-√3/2X²-3√3/2=0-√3/2X²=3√3/2-√3=3√3X²X²=-1/3,无解√3/2X²-3√3/2=0√3/2X²=3√
再问:我去再问:再问:是这个再问:是x分之2么再答:是的
2*x^3-3*x^2=-1x^2*(2x-3)=-1x^2≥0.即:2x-3=-1x=1
[x-1]/(x-3)=m^2/(2x-6)2(x-1)=m^2当X-3=0,即X=3时方程有增根,代入得:m^2=2(3-1)=4m=+2或-2
2x²-3x=(1/2)(x²-6x)4x²-6x=x²-6x3x²=0得x=0
2√(x²y)/3√(xy)=2√x√(xy)/3√(xy)=2(√x)/3
x再答:第二个你错了再答:7x²再问:那x的3次方除以x的3次方等于多少呢?再答:1
x=(√20-4)/2=(2√5-4)/2=√5-2所以x²=(√5)²-4*√5+4=9-4√51/x=1/(√5-2)=(√5+2)/[(√5)²-2²]=
2x-3²=x²﹣92x-x²=9-9-x²+2x=0x²-2x=0配方x²-2x+1=0+1(x-1)²=1x-1=±1解得x&
将3x/(x-1)-x/(x+1)通分得
(x²+xy)/(x+y)²=x(x+y)/(x+y)²=x/(x+y)2xy/(x+y)²x/(x²-y²)∵最简公分母为:(x+y)
x²/(x-1)-x=(x²-x²+x)/(x-1)=x/(x-1)
y=(3x²+2x+2)/(x²+x+1)yx²+yx+y=3x²+2x+2(y-3)x²+(y-2)x+(y-2)=0x是实数,所以判别式大于等于0
【分析】(x-3)^2=(3-x)^2只需要提取公因式x/(3-x)3x/(x-3)^2-x/(3-x)=3x/(3-x)^2-x/(3-x)=x/(3-x)[3/(3-x)-1]=x/(3-x)*x
2Y分之X平方