先化简,再求值x-1分之x-2 (x 1-x-1分之3),其中x=根号3-2
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![先化简,再求值x-1分之x-2 (x 1-x-1分之3),其中x=根号3-2](/uploads/image/f/2039642-26-2.jpg?t=%E5%85%88%E5%8C%96%E7%AE%80%2C%E5%86%8D%E6%B1%82%E5%80%BCx-1%E5%88%86%E4%B9%8Bx-2+%28x+1-x-1%E5%88%86%E4%B9%8B3%29%2C%E5%85%B6%E4%B8%ADx%3D%E6%A0%B9%E5%8F%B73-2)
题目有误吧(x-x)x-1分之4(x-x)+(x-2)再问:(x方-x)(x-2)方再答:
解x/(x+2)-(x²+2x+1)/(x+2)÷(x²-1)/(x-1)=x/(x+2)-(x+1)²/(x+2)÷(x-1)(x+1)/(x-1)=x/(x+2)-(
原式=[3x(x+1)-x(x-1)/x^2-1]×(x^2-1/2x)上面化到最后=[2x(x+2)/x^2-1]×x^2-1/2x=x+2当x=3时,原式=-3+2=-1(在键盘上打这个好辛苦啊~
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/(x-1)-x/(x+1)×(1-x)/2x=x/(x-1)+(x-1)/2(x+1)=[2x(x+1)+(x-1)²]/2(x-1)(x+1)=(3x²+1)/2(x
(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
x+4>0x>-42x+5
你写的看不懂分子分母的代数式用括号括起来否则分不出来先通分【((x-2)(x+2)-x(x-1))/x(x+2)(x+2)】(x+2)/(x-4)=(x-4)/x(x+2)(x-4)=1/x(x+2)
(4x²-4x+2分之x)*(2x²-x)=(4x²-7x/2)*(2x²-x)=(x/2)(8x-7)(x)(2x-1)=x^2(8x-7)(2x-1)/2,
(1+1/(x-1))÷x/(x²-1)=x/(x-1)÷x/(x+1)(x-1)=x/(x-1)×(x+1)(x-1)/x=x+1代入可得结果等于-1
[4(x²-x)+(x-2)²]/(x-1)=(4x²-4x+x²-4x+4)/(x-1)=(5x²-8x+4)/(x-1)=[5(x-1)²
1、(x-3分之2x-x+3分之x)乘x分之x平方-9=[2X(X+3)-X(X-3)]/[(X-3)(X+3)]*(X+3)(X-3)/X=[2X^2+6X-X^2+3X]/X=X+9当X=1时,原
(x-1分之3x-x+1分之x)*x分之x的平方-1=[3x(x+1)-x(x-1)]/x=3(x+1)-(x-1)=3x+3-x+1=2x+4=2√2-4+4=2√2再问:确定么再答:确定啊,楼下也
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..
[3x/(x-1)-x/(x+1)]×(x²-1)/x=x[3(x+1)-(x-1)]/(x²-1)×(x²-1)/x=2x+4当x=√2-2时,原式=2x+4=2√2
原式=[2x(x+2)-x(x-2)]/(x²-4)+x/(x²-4)=(x²+7x)/(x²-4)=[x(x+7)]/[(x+2)(x-2)]代入x=5原式=
=(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
(x²-1分之x-3)÷(x²+2x+1分之x²-2x-3)-(x+1分之1)=(x-3)/(x+1)(x-1)×(x+1)²/(x-3)(x+1)-1/(x+