1-(1-1 1-x)²÷x²-x-1 x²-2x 1
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[(x+2)/(x*x-2x)-(x-2)/(x*x-4x+4)]/[(x-4)/x]=[(x+2)/x(x-2)-(x-2)/(x-2)²]/[(x-4)/x]=[(x²-4-x
=(x+1)(x-1)(x+1)x-1--------------÷------×-----(x-1)^2(x-1)x+1=x+1---x-1
(x+1-1/1-x)÷(x-x²/x-1)=[(x+1)+1/(x-1)]×[-(x-1)/x(x-1)]=(x²-1+1)/(x-1)×(-1/x)=-x/(x-1)(x-4/
解题思路:考察函数的概念及性质解题过程:varSWOC={};SWOC.tip=false;try{SWOCX2.OpenFile("http://dayi.prcedu.com/include/re
这是两道题吗?1、两边同时乘(x-1)(x-2)(x-3)答案是x1=-1,x2=22、分母因式分解分别为(x-7)(2x+3)和(x-5)(x-7)然后同时乘(x-5)(x-7)(2x+3)答案是x
1x+2x+3x+4x+5x+6x+7x+8x+9x+10x+11x+12x+13x+14x+15x=550120x=550x=55/12=4.583
解题思路:配方法,转化求解。配方法,转化求解。配方法,转化求解。解题过程:
解题思路:分式的混合运算,按照分式运算法则进行计算。解题过程:
解题思路:本题考查有关式子的变形问题,注意完全平方公式的应用解题过程:
先化简去掉中括号:(1-x+x-1/x)÷(1-1/x-1)再化简:(1-1/x)÷(-1/x)=(1-1/x)x(-x)=1-x
这个简单啊3的x+1次方乘以2的x次方减去3的x次方乘以2的x+1次方=216化简就是3的x次方×3×2的x次方-3的x次方×2的x次方×2=(3×2)的x次方×3-(3×2)的x次方×2=216所以
[1/(x-1)(x+2)]+[1/(x+2)(x+5)]+[1/(x+5)(x+8)]+[1/(x+8)(x+11)]=(1/3x-3)-1/24(1/3)[1/(x-1)-1/(x+11)]=1/
解题思路:先化简代数式,再把x²-5x=14代入进行计算解题过程:0最终答案:略
原式=[x(x-3)/(x-3)²][(x-5)(x-6)/x(x-5)]-1=[x/(x-3)][(x-6)/x]-1=(x-6)/(x-3)-1=(x-6-x+3)/(x-3)=-3/(
解1:原式=x(x-1)/(x+1)*(x+1)/x=x-1解2:原式=(x+3)^2/(x+3)(x-3)*(x-3)/(x+2)=(x+3)/(x-3)*(x-3)/(x+2)=(x+3)/(x+
2x/(x-2)(x+1)÷(1-x/x+1)-x²+2x/x²-4?=2x/(x-2)(x+1)×(x+1)/(1-x)-x(x+2)/(x+2)(x-2)=2x/(x-2)(1
用换元法设x*x+11x-8=A然后再做
=【3x(x+1)-x(x-1)]/(x+1)(x-1)×(x+1)(x-1)/x=(3x²+3x-x²+x)/x=4
x(2-1/x)+x/(x^2-2x)÷(3-x)/(x^2-4)=x((2x-1)/x)+x/(x^2-2x)x(x^2-4)/(3-x)=(2x-1)+(x+2)/(3-x)=(7x-3-2x^2
你的括号丢得太多了,我猜猜猜1、实在猜不出来,哪里该有括号2、2X/(2X-1)+X/(X-2)=2[2X(X-2)+X(2X-1)]/(2X-1)(X-2)=22X^2-4X+2X^2-X=4X^2