已知x-2分之x 2-(X-1)的0次方 (x 1)的-2次方有意义-搜答案-智慧作业帮

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

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

x+1/x=2(x+1/x)^2=4x^2+2+1/x^2=4x^2+1/x^2=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

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

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)

X2+Y2+8X+6Y+25=0x²+8x+16+y²+6y+9=0(x+4)²+(y+3)²=0∴x+4=0y+3=0x=-4y=-3X2+4XY+4Y2分之

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

X^2-5x=14->x=-2或x=72x^2-x-2x+1-[x^2+2x+1]+1=x^2-5x+1=15

这道题,谁要是能理解是什么式子,就已经是大神了

x^(1/2)+x^(-1/2)=3求x^2+x^(-2)-(x^(3/2)+x^(-3/2))/2-3解:x^(1/2)+x^(-1/2)=3两边平方,得x+x^(-1)+2=9即x+x^(-1)=

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&

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)=

x1+x2=-3/2x1x2=-21/x1+1/x2=（x1+x2)/x1x2=(-3/2)/(-2)=3/4x1²+x2²=(x1+x2)²-2x1x2=(-3/2)&

这是七年级下册的分式方程.1.去分母：两边同时乘X*（X-2）得X²+4-X²=a*（X-2）2.去括号,合并同类项得aX=2a+43.系数化为一得X=a分之2a+4因为方程无解,

x1+x2=4x1x2=-1(x1+x2)^2/(1/x1+1/x2)=(x1+x2)^2*x1x2/(x1+x2)=x1x2*(x1+x2)=-4