化简求值,X-1分之1除以(...),其中X=3乘30度-1

因为x=1+根号2y=1减根号2所以xy=1+根号2乘以1减根号2=1-2=-1x+y=2所以可以求得,原式=xy/(x+y)=-1/2

所求之数值是1.[(xy+2)(xy-2)-(xy+2)²+8]÷(2x)={(xy+2)[(xy-2)-(xy+2)]+8}/(2x)=[(xy+2)(xy-2-xy-2)+8]/(2x)

x+2分之x-x+2分之x平方+2x+1除以x-1分之x平方-1=[x/(x+2)-(x²+2x+1)/(x+2)]÷(x²-1)/(x-1)=[(x-x²-2x-1)/

(x-1/x)/((x²-2x+1)/x)=((x²-1)/x)/((x-1)²/x)=(x+1)(x-1)/(x-1)²=(x+1)/(x-1)=6/4=3/

(x-1分之x平方-1-x分之2x)除以x-1分之x,其中x=根号3+1=[x²/(x-1)+2x/(x-1)]÷x/(x-1)=x(x+2)/(x-1)*(x-1)/x=x+2其中x=根号

原式=(x²-1-15)/(x-1)×(x-1)/(x-4)=(x²-16)/(x-4)=x+4当x=√3-4时原式=√3

（x-1-x+1分之8）除以x+1分之x+3=(x²-1-8)/(x+1)×(x+1)/(x+3)=(x+3)(x-3)/(x+1)×(x+1)/(x+3)=x-3=3-√2-3=-√2

[（x-1)/x-(x-2)/(x+1)]÷[(2x^2-x)/(x^2+2x+1)]=[(x-1)(x+1)-x(x-2)]/x(x+1)÷[x(2x-1)/(x+1)^2=(2x-1)/x(x+1

[4(xy-1)^2-(xy+2)(2-xy)]除以4分之1xy=[4x^2乘以y^2-8xy+4-(4-x^2y^2)]除以4分之1xy=(4x^2乘以y^2-8xy+4-4+x^2y^2)除以4分

您好：x-2＞0x>22x+1＜82x

原式=(x-1)(x+1)/(x+2)*(x+2)/x-1=x+1然后代入数值即可很高兴为您解答,【学习宝典】团队为您答题.请点击下面的【选为满意回答】按钮,

因为(x-1/x)÷（x+1）/x=（x+1）（x-1)/x×x/（x+1）=x-1.所以当x=根2+1时,原式=根2..

（1+(x-1分之1））除以（x的平方-1）分之x=x-1分之x乘以x分之(x+1)(x-1)=x+1额,x的值呢?

{1-x/(x-1)}÷1/x(x-1)=(x-1-x)/(x-1)÷1/x(x-1)=-1/(x-1)÷1/x(x-1)=-x

原式=[3/(x-1)-1/(x+1)]÷x/(x²-1)=[3/(x-1)-1/(x+1)]×(x²-1)/x=[3/(x-1)]×(x²-1)/x-[1/(x+1)]

=（x+1）/（（2*x+1+x^2）/x）=（x+1）/（（x+1）^2/x）=（x+1）*x/（x+1）^2=x/（x+1）代入x=-3/2得到：原式=3

1除以x(x+1)+1除以(x+1)(x+2)+1除以(x+2)(x+3)+……+1除以(x+2012)(x+2013)=1/x-1/(x+1)+1/(x+1)-1/(x+2)+1/(x+2)-1/(

:(x^2-4x)/(x+1)除以(4-x)/x,=x(x-4)/(x+1)*x/(4-x)=-x^2/(x+1)=-9/(-2)=9/2

[（x+2)/x-(x-1)/(x-2)]÷（x-4)/x=[1+2/x-1-1/(x-2)]×x/(x-4)=(x-4)/x(x-2)×x/(x-4)=1/(x-2)=1/(3-2)=1这是我在静心

(x+1分之1+x-1分之1)·(x平方-1)=x+1分之1·(x平方-1)+x-1分之1·(x平方-1)=x-1+x+1=2x