x平方 ax b除以x-1等于1-搜答案-智慧作业帮

lim[(cosx)^(1/x^2)],=lim[1-2sin^2(x/2)]^(1/x^2)==lim[1-x^2/2)]^(1/x^2)=lim[1-x^2/2)]^[(-2/x^2)*(-1/2

再答：把y解出来再带进去再问：可以照清楚一点吗再答：再问：谢谢，不用了

[（1/4x）^2+x]÷（1/2-x）=(1/16x^2+x)×(2-1/x)=1/8x^2-1/16x+2x-1=16×（1/8x^2-1/16x+2x-1）=2x^2-x+32x-16=2x^2

X²+X=X(X+1)X（X+1）/X=X+1X+1-X=1

5/(x²+x)-1/(x²-x)=05/x(x+1)-1/x(x-1)=05x-5-x-1=04x=6x=3/2x=2分之3再问：5x-5-x-1=0这个是怎么算的？再答：方程两

4x三次除以(-2x)平方-(2x平方-x)除以(1/2x)=4x^3/4x^2-(2x^2-x)/(1/2x)=x-2x(2x-1)/x=x-2(2x-1)=x-4x+2=-3x+2

你的题目叙述有错,我没法帮你解答.1分之三?那不就是3么?如果不会在提问框中列算式,就在word中列好算式然后截图上来.

因为x^2-x^2/2=3==>x^2=6==>x=根号61/(1-x)-(1/(1x))/(x/(x^2-1)x)=1/(1-x)-(1/(1x))/((xx^3-x)/(x^2-1))=1/(1-

你的题是[(x-2)/(x+2)]-1=3/(x^2-4)等式前面通分得：（x-2)/(x+2)-(x+2)/(x+2)=3/(x^2-4)化简：-4/(x+2)=3/(x^2-4)3x+6=-4x^

x=1/x,x²=1,x=±1；[（x²+2x-3）/（x-1)]/[（x+3）/（x²-3x+1）]=（x+3)(x-1)(x²-3x+1）/[（x-1)(x

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

[x-1]/(x-3)=m^2/(2x-6)2(x-1)=m^2当X-3=0,即X=3时方程有增根,代入得：m^2=2(3-1)=4m=+2或-2

已知：(x^2-x+1)/x=5,　　即x-1+1/x=5　　x+1/x=6;　两侧平方：x^2+2+1/x^2=36　　即x^2+1/x^2=34　　求:x^2/(x^4+x^2+1)=?x^2/(

c=√(a²+b²)e1=c/a,e2=c/be1+e2=c*(1/a+1/b)=c(a+b)/(ab)(e1+e2)²=c²*(a+b)²/(a&#

x=(√20-4)/2=(2√5-4)/2=√5-2所以x²=(√5)²-4*√5+4=9-4√51/x=1/(√5-2)=(√5+2)/[(√5)²-2²]=

将3x/(x-1)-x/(x+1)通分得

1

1/x+x=5,求x^2/(x^4+x^2+1)=?由1/x+x=5得1+x^2=5x,===》x^2=5x-1,代人x^2/(x^4+x^2+1)=（5x-1）/【（5x-1）/(5x-1)^2+（

x²/(x-1)-x=(x²-x²+x)/(x-1)=x/(x-1)

y=(3x²+2x+2)/(x²+x+1)yx²+yx+y=3x²+2x+2(y-3)x²+(y-2)x+(y-2)=0x是实数,所以判别式大于等于0