化简x2-1分之x2-2x+1+x+1分之2,并代入一个你最喜欢的值进行计算
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(2x²+x-2)/(2(2x+1))
设(x²-1)/(x²+2x)=t则8t+3/t=118t²-11t+3=0(8t-3)(t-1)=0解得t=3/8或t=11.t=3/8(x²-1)/(x
(2x+1)/(x^2+1)>0,x^2+1>0,上式变为2x+1>0,2x>-1,∴x>-1/2.(2x+1)/(x^2+2)>1,x^2+2>0,两边都乘以x^2+2,得2x+1>x^2+2,∴x
so easy、、提示一下,望采纳
x^2-3x+2=0(x-2)(x-1)=0x=2或x=1当x=2时x^2+1/x^2=2^2+1/2^2=4+1/4=17/4当x=1时x^2+1/x^2=1^2+1/1^2=1+1=2
原式=(x²+3x+9)/(x-3)(x²+3x+9)-6x/x(x-3)(x+3)-(x-1)/2(x+3)=1/(x-3)-6/(x-3)(x+3)-(x-1)/2(x+3)=
(x²+2x+1)/(x²-y²)÷(x+1)/(x-y)=(x+1)²/(x+y)(x-y)×(x-y)/(x+1)=(x+1)/(x+y)【俊狼猎英】团队为
已知:(x²+1)/x=x²/x+1/x=x+1/x所以:x²+1/x²=x²+1/x²+2-2=(x+1/x)²-2
x=7(x²-x+1)7x²-7x+7=x7x²+7=8x两边平方49x4+98x²+49=64x²两边减去49x²49x4+49x&sup
方程两边同时乘以x(x+1)(x-1)得:5(x-1)+3(x+1)=7x解得:x=2检验:x(x+1)(x-1)=6所以x=2是原分式方程的解
=2x/(x+2)(x-2)-(x+2)/(x+2)(x-2)=[2x-(x+2)]/(x+2)(x-2)=(2-x)/(x+2)(x-2)=-1/(x+2)
原式=(x+1)/(x-1)-x(x-2)/(x+1)(x-1)÷(x-2)(x+1)/(x+1)²=(x+1)/(x-1)-x/(x-1)=(x+1-x)/(x-1)=1/(x-1)请好评
追问分式方程:x分之480-2x分之600=45对不起,没有分了480/X-600/2X=45(480-600/2)1/x=45180=45XX=4
这道题,谁要是能理解是什么式子,就已经是大神了
x²+2x+1=10(x+1)²=10x+1=3或x+1=-3所以x=2或x=-4【(x²+4)/x-4】÷【(x²-4)/(x²+2x)】=【(x&
(x^2-2x+1)/(x^2-1)+1/(x+1)=(x-1)^2/(x+1)(x-1)+1/(x+1)=(x-1)/(x+1)+1/(x+1)=x/(x+1)=1-根2分之一
原式=[(x²-2x)/(x²-1)]÷[(x-1)-(2x-1)/(x+1)]=[(x²-2x)/(x²-1)]÷[(x²-2x)/(x-1)]=[
发照片呀再问:请原谅手机不行再问:请帮我一下,谢谢。再答:看不明白再问:你写出来就行了的再答: 再答:是这样吗再问:嗯,麻烦把过程写详细点再答:我说题目对不再问:是的再问:对的再问:还有一个
X+3X+9/X-27+6X/9X-X-X-1/6+2X=X-X+3X-X+2X+9/X-27+2/3-1/6=4X+9/X-27+(4-1)/6=4X+9/X-27+1/2=4X+9/X-(54-1
你确认不是二分之一.==