x分之x 1除以(x-2x分之1 x的平方
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![x分之x 1除以(x-2x分之1 x的平方](/uploads/image/f/900827-35-7.jpg?t=x%E5%88%86%E4%B9%8Bx+1%E9%99%A4%E4%BB%A5%28x-2x%E5%88%86%E4%B9%8B1+x%E7%9A%84%E5%B9%B3%E6%96%B9)
先把分母都配平变成(x加1/x平方减4减去2(x减2)/x平方减4)乘以x加2/x减5等于负x减5/x平方减4乘以x减2/x减5等于负x减2/x平方减4等于x减2/(x加2)(x减2)最后等于1/x加
x+2分之x平方-2x-x-1分之x平方-4X+4除以x平方-16分之x平方+4x=x(x-2)/(x+2)÷(x-2)^2/(x-1)÷[x(x+4)/(x+4)(x-4)]=[x(x-2)/(x+
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原式=(x²+x-2x)/(x+1)÷[(x-1)²/(x+1)(x-1)]=(x²-x)/(x+1)÷[(x-1)/(x+1)]=x(x-1)/(x+1)*(x+1)/
原式=[(x+2)/x(x-2)-(x-1)/(x-2)²]*x/(x-1)(x-4)*(x-2)²=(x²-4-x²+x)/x(x-2)²*x/(x
①3除以x分之2=3*x/2=3x/2②x分之3除以x^2分之6=3/x*x^2/6=x/2③x分之2x+1除以5分之6+12x=(2x+1)/x*5/(6+12x)=5/6x④x^2+3x+2分之x
原式=[√(x/4)-2x√(1/x)]÷3√x=√(x/4)÷3√x-2x√(1/x)÷3√x=(1÷3)×√(x/4÷x)-(2x÷3)×√(1/x÷x)=1/3×√(1/4)-(2x/3)×√(
把平方代入根号除以根号得出{3根号X-2根号X}除以3根号X=根号X除以3根号X=3分之1
x^2-x-6分解因式得(x+2)(x-3)x^2-4分解因式得(x-2)(x+2)故(x^2-x-6分之x^2-4+x-3分之x+2)=(x-2)/(x-3)+(x+2)/(x-3)=2x/(x-3
原式=[(1-1分之x+5)-(1-1分之x+4))+(1-1分之x+3)-(1-1分之x+2)]*[(x+3)(x+5)]\(x^2+7x+13)=[(1分之x+2)-(1分之x+3)+(1分之x+
x的平方-2x+1分之x²-1+x-2分之2x-x²除以x=(x+1)(x-1)/(x-1)²-x(x-2)/(x-2)÷x=(x+1)/(x-1)-1=(x+1-x+1
=[(x+1)(x-1)/(x-1)²-(x-1)/(x+1)]×(x-1)/x=[(x+1)²-(x-1)²]/(x+1)(x-1)×(x-1)/x=4x/(x+1)(
原式=(x-1)/(x-2)÷(x-1)²/(x+2)(x-2)=(x-1)/(x-2)*(x+2)(x-2)/(x-1)²=(x+2)/(x-1)
(x的平方-1分之x的平方-2x+1+x分之1)除以x+1分之1=((x-1)^2/(x-1)(x+1)+1/x)*(x+1)=((x-1)/(x+1)+1/x)*(x+1)=(x-1)+(x+1)/
(2-x)/(x-1)÷[x+1-3/(x-1)]=(2-x)/(x-1)÷[(x²-1-3)/(x-1)]=-(x-2)/(x-1)×(x-1)/[(x+2)(x-2)]=-1/(x+2)
x1+x2=4x1x2=-1(x1+x2)^2/(1/x1+1/x2)=(x1+x2)^2*x1x2/(x1+x2)=x1x2*(x1+x2)=-4
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答:[x/(x-1)+1/(x-1)]÷[(x+1)/(x²-2x+1)]=[(x+1)/(x-1)]÷[(x+1)/(x-1)²]=[(x+1)/(x-1)]×[(x-1)