(先化简再求值x分之x-1减x 1分之x2),其中x满足x平方-x-1=0
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![(先化简再求值x分之x-1减x 1分之x2),其中x满足x平方-x-1=0](/uploads/image/f/16654-22-4.jpg?t=%28%E5%85%88%E5%8C%96%E7%AE%80%E5%86%8D%E6%B1%82%E5%80%BCx%E5%88%86%E4%B9%8Bx-1%E5%87%8Fx+1%E5%88%86%E4%B9%8Bx2%29%2C%E5%85%B6%E4%B8%ADx%E6%BB%A1%E8%B6%B3x%E5%B9%B3%E6%96%B9-x-1%3D0)
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:
原式=(x+1)/x÷(2x²-1-x²)/2x=(x+1)/x÷(x²-1)/2x=(x+1)/x÷(x+1)(x-1)/2x=(x+1)/x*2x/(x+1)(x-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/
原式=(2-x-x-2)/(x+2)*(x+2)(x-2)/2x=-2x/(x+2)*(x+2)(x-2)/2x=-1/(x-2)=-1/(2-√2-2)=√2/2
你的式子太乱了,而且开头就是x=,分子分母分别用括号括起来,加减时也用括号括起来,一部分一部分的写清楚些再问:题目就是这样再答:那你看一下是不是我写的这个式子:x=((2-x-1)/2)/(x^2-(
【先化简再求值】(x-1)分之x÷【(1-x分之1)-1-x】=(x-1)分之x÷(x^2/(1-x))=-1/xx=1时,原式无意义,x=2时,原式=-1/2,x=0时,原式无意义【选择题】下列约分
只有我能看懂吧?!再答: 再答:题是这样的吗?再答: 再问:你终于回来了再问:在吗再答:在再问:等等我去写题再问:去吧
原式=[3x/(x-1)-x/(x+1)]×[(x²-1)/x]={3x(x+1)/[(x-1)(x+1)]-x(x-1)/[(x-1)(x+1)]}×[(x-1)(x+1)/x]=[3x(
=(x+1)(x-1)/x÷(x-2x+1)/x=(x+1)(x-1)/x×[-x/(x-1)==x+1当x=√2时原式=√2+1再问:对不起,是我没说明白x²-1÷(1-x分之2x-1)是
答案是不是二分之X+2的平方—X的平方之一最后是5+2倍的根下2
/>(2x-x分之1+x的平方)除以x分之x-1,其中x=根号2=[2x²-(1+x²)]/x÷(x-1)/x=(x²-1)/(x-1)=(x-1)(x+1)/(x-1)
原式=x^2/(x-1)+1/(1-x)=(x^2-1)/(x-1)=(x+1)(x-1)/(x-1)=x+1x=-3/2原式=-3/2+1=-1/2如果有疑问请点【评论】或者【追问】再问:-a分之1
1/(x-3)+6/(9-x^2)=1/(x-3)+6/(3-x)(3+x)=(x+3-6)/(x-3)(x+3)=1/(x+3)=1/(-2)=-1/2
(x+3)/(x²-9)+3/(x-3)=(x+3)/(x-3)(x+3)+3/(x-3)=1/(x-3)+3/(x-3)=4/(x-3)代入x=-1/2原式=4/(-1/2-3)=4/(-