x 2分之1-x=2-X分之1-2
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(2x²+x-2)/(2(2x+1))
你的题目应该是:2x/(x^2-1)=A/(x+1)+B/(x-1)对问题进行变形得:2x/[(x+1)(x-1)]=A/(x+1)+B/(x-1)对等式的右边进行通分整理得2x/[(x+1)(x-1
=【1/(x-1)²-1/(x+1)²】÷【1/(x+1)+1/(x-1)】=【(x+1)²-(x-1)²】/【(x-1)²(x+1)²】÷
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
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
x+1/x=3,两边同时平方得到x^2+1/x^2+2=9所以x^2+1/x^2=7x^2/(x^4+x^2+1)=1/(x^2+1/x^2+1)=1/(7+1)=1/8
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)
两边乘以(x+3)(x-3)得12-2(x+3)=x-312-2x-6=x-3-3x=-9x=3检验:x=3是增根∴方程无解
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
2(x2+x2分之1)-3(x+x分之1)-1=0解方程,是这个吧2(x2+2+x2分之1)-3(x+x分之1)-5=02(x+x分之1)平方-3(x+x分之1)-5=0[2(x+x分之1)-5][(
x+2分之x-2+x2-4分之4=1(x-2)/(x+2)+4/(x²-4)=1[(x-2)²+4]/(x²-4)=1[(x-2)²+4]=(x²-4
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
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
你确认不是二分之一.==
x2+2x-3分之2x+x+3分之1=14x-3分之5x+3分之1=13分之1x+3分之1=13分之1x=3分之2x=2如果有不会的追问,
因为x又x分之1=3,即x+1/x=3所以x+1/x=7则x^4+1/x^4=47所以:(x^10+x^8+x^2+1)/(x^10+x^6+x^4+1)=
原式=(x+1)/(x+1)²×x(x-1)/[-2(x-1)]=-1/(x+1)×x/2=-x/2(x+1)当x=√2时原式=-√2/2(√2+1)=-√2(√2-1)/2=(√2-2)/