先化简:(x+1分之3-x+1)÷x+1分之x²-4x+4
来源:学生作业帮助网 编辑:作业帮 时间:2024/11/19 21:06:21
原式=[3x(x+1)-x(x-1)/x^2-1]×(x^2-1/2x)上面化到最后=[2x(x+2)/x^2-1]×x^2-1/2x=x+2当x=3时,原式=-3+2=-1(在键盘上打这个好辛苦啊~
x+2分之x-x+2分之x平方+2x+1除以x-1分之x平方-1=[x/(x+2)-(x²+2x+1)/(x+2)]÷(x²-1)/(x-1)=[(x-x²-2x-1)/
3分之X+15分之X+35分之X+63分之X+99分之X=11/2x*(1-1/3+1/3-1/5+1/5-1/7+1/7-1/9+1/9-1/10)=11/2x*(1-1/10)=11/2x*9/1
(x-1分之x平方-1-x分之2x)除以x-1分之x,其中x=根号3+1=[x²/(x-1)+2x/(x-1)]÷x/(x-1)=x(x+2)/(x-1)*(x-1)/x=x+2其中x=根号
原式得:1/(x-3)=2-x/(x-3)两边同时乘以x-3得:2x-6-x=1x-6=1x=7
x^2-x-6分解因式得(x+2)(x-3)x^2-4分解因式得(x-2)(x+2)故(x^2-x-6分之x^2-4+x-3分之x+2)=(x-2)/(x-3)+(x+2)/(x-3)=2x/(x-3
原式=[(1-1分之x+5)-(1-1分之x+4))+(1-1分之x+3)-(1-1分之x+2)]*[(x+3)(x+5)]\(x^2+7x+13)=[(1分之x+2)-(1分之x+3)+(1分之x+
3/(x+1)-3x/(x+1)?=(3-3x)/(x+1)=3(1-x)/(1+x)再问:(x-1)的平方分之三-(x-1)的平方分之3x再答:3/(x-1)^2-3x/(x-1)^2=(3-3x)
x平方-6x+8=x²-2×3x+9-9+8=(x-3)²-1=(x-3-1)(x-3+1)=(x-4)(x-2)x平方+x-6=(x-2)(x+3)12+x-x平方=(4-x)(
1、(x-3分之2x-x+3分之x)乘x分之x平方-9=[2X(X+3)-X(X-3)]/[(X-3)(X+3)]*(X+3)(X-3)/X=[2X^2+6X-X^2+3X]/X=X+9当X=1时,原
(x-1分之3x-x+1分之x)*x分之x的平方-1=[3x(x+1)-x(x-1)]/x=3(x+1)-(x-1)=3x+3-x+1=2x+4=2√2-4+4=2√2再问:确定么再答:确定啊,楼下也
(x-3)分之x-(x^2-3x)分之(x+6)+x分之1等于几?=x²/x(x-3)-(x+6)/x(x-3)+(x-3)/x(x-3)=(x²-x-6+x-3)/x(x-3)=
1、x-x-1分之1=1X(X-1)=X-1(X-1)^2=0X=1,经检验X=1是增根,原方程无解.2、1-x分之1-2=1-x²分之3x-x²(1+X)-2(1-X^2)=3X
[3x/(x-1)-x/(x+1)]×(x²-1)/x=x[3(x+1)-(x-1)]/(x²-1)×(x²-1)/x=2x+4当x=√2-2时,原式=2x+4=2√2
1/x(x+1)=1/x-1/(x+1)1/(x+1)(x+2)=1/(x+1)-1/(x+2)后面以此类推原式=1/x-1/(x+1)+1/(x+1)-1/(x+2)+……+1/(x+1998)-1
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再问:再答:
(x²-1分之x-3)÷(x²+2x+1分之x²-2x-3)-(x+1分之1)=(x-3)/(x+1)(x-1)×(x+1)²/(x-3)(x+1)-1/(x+
(x+1)/(x+2)-1/(x+7)=(x+2)/(x+3)-1/(X+6)(X+2-1)/(X+2)-1/(X+7)=(X+3-1)/(X+3)-1/(X+6)1-1/(X+2)-1/(X+7)=