(1-x 2分之1)÷x 2分之x² 2x 1-搜答案-神马作文网

f(x-x分之一)=X2+x2分之一F(X-1/X)=X^2+1/X^2=(X-1/X)^2+2所以F(X)=X^2+2f(3)=9+2=11

(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

=【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

（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

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

x2-4分之2x-x-2分之1

=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

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

{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

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.==

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)=

提取公因式(x1-x2)原式=(x1-x2)]1-4/x1x2]