1.c/2ab+b/3a^2c-a/5c^22.2x+2+(5/x-1)3.(a+1/a^2+3a+2)+(a+3/a^2+7a+12)4.(x/a-y+y/y-x)/(xy/x-y)5.(3-m/2m-4)/(m+2-5/m-2)6.(a+1/2a-2 -3/2a^2-2 -a+3/2a+2)* 4a^-4/3 7.(a-b/a+b-a+b/a-b)/(1- a^2+b^2/a^2-2ab+b^2)8.[(1+ 4/x-2)(x-4+ 4/x)-3]/(4/x -1)9.[1/a^2 + 1/
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![1.c/2ab+b/3a^2c-a/5c^22.2x+2+(5/x-1)3.(a+1/a^2+3a+2)+(a+3/a^2+7a+12)4.(x/a-y+y/y-x)/(xy/x-y)5.(3-m/2m-4)/(m+2-5/m-2)6.(a+1/2a-2 -3/2a^2-2 -a+3/2a+2)* 4a^-4/3 7.(a-b/a+b-a+b/a-b)/(1- a^2+b^2/a^2-2ab+b^2)8.[(1+ 4/x-2)(x-4+ 4/x)-3]/(4/x -1)9.[1/a^2 + 1/](/uploads/image/z/5444926-70-6.jpg?t=1.c%2F2ab%2Bb%2F3a%5E2c-a%2F5c%5E22.2x%2B2%2B%285%2Fx-1%293.%28a%2B1%2Fa%5E2%2B3a%2B2%29%2B%28a%2B3%2Fa%5E2%2B7a%2B12%294.%28x%2Fa-y%2By%2Fy-x%29%2F%28xy%2Fx-y%295.%283-m%2F2m-4%29%2F%28m%2B2-5%2Fm-2%296.%28a%2B1%2F2a-2+-3%2F2a%5E2-2+-a%2B3%2F2a%2B2%29%2A+4a%5E-4%2F3+7.%28a-b%2Fa%2Bb-a%2Bb%2Fa-b%29%2F%281-+a%5E2%2Bb%5E2%2Fa%5E2-2ab%2Bb%5E2%298.%5B%281%2B+4%2Fx-2%29%28x-4%2B+4%2Fx%29-3%5D%2F%284%2Fx+-1%299.%5B1%2Fa%5E2+%2B+1%2F)
1.c/2ab+b/3a^2c-a/5c^22.2x+2+(5/x-1)3.(a+1/a^2+3a+2)+(a+3/a^2+7a+12)4.(x/a-y+y/y-x)/(xy/x-y)5.(3-m/2m-4)/(m+2-5/m-2)6.(a+1/2a-2 -3/2a^2-2 -a+3/2a+2)* 4a^-4/3 7.(a-b/a+b-a+b/a-b)/(1- a^2+b^2/a^2-2ab+b^2)8.[(1+ 4/x-2)(x-4+ 4/x)-3]/(4/x -1)9.[1/a^2 + 1/
1.c/2ab+b/3a^2c-a/5c^2
2.2x+2+(5/x-1)
3.(a+1/a^2+3a+2)+(a+3/a^2+7a+12)
4.(x/a-y+y/y-x)/(xy/x-y)
5.(3-m/2m-4)/(m+2-5/m-2)
6.(a+1/2a-2 -3/2a^2-2 -a+3/2a+2)* 4a^-4/3
7.(a-b/a+b-a+b/a-b)/(1- a^2+b^2/a^2-2ab+b^2)
8.[(1+ 4/x-2)(x-4+ 4/x)-3]/(4/x -1)
9.[1/a^2 + 1/b^2 + (2/a+b)(1/a+1/b]/[(a+b)^2/ab]
10.已知x^2-3x+1=0求 1.x+1/x 2.x^2+1/x^2 3.x^4+1/x^4的值
11.化简x-2/x^9-9(1+ 2x-7/x^2-4x+4)/ 1/x+3 并求x=2006时的值
12.化简(x^2+4x+4/x^2-6x+9 -2+ 9-6x+x^2/4+4x+x^2)*x^2-x-6/4x^2-4x-1
麻烦有过程都写出来
1.c/2ab+b/3a^2c-a/5c^22.2x+2+(5/x-1)3.(a+1/a^2+3a+2)+(a+3/a^2+7a+12)4.(x/a-y+y/y-x)/(xy/x-y)5.(3-m/2m-4)/(m+2-5/m-2)6.(a+1/2a-2 -3/2a^2-2 -a+3/2a+2)* 4a^-4/3 7.(a-b/a+b-a+b/a-b)/(1- a^2+b^2/a^2-2ab+b^2)8.[(1+ 4/x-2)(x-4+ 4/x)-3]/(4/x -1)9.[1/a^2 + 1/
1.c/2ab+b/3a^2c-a/5c^2
=(15a*c^2+10b^2-6a^3*b)/30a^2*b*c^2
2.2x+2+(5/x-1)
=2x+5/x+1
3.(a+1/a^2+3a+2)+(a+3/a^2+7a+12)
=(a+2)+(a+4)
=2a+6
4.[x/(x-y)+y/(y-x)]/(xy/x-y)
=1/y+1/x
5.[(3-m)/(2m-4)]/[m+2-5/(m-2)]
=-1/2(m+3)
6.(a+1/2a-2 -3/2a^2-2 -a+3/2a+2)* 4a^-4/3
=[(a+1)^2-3-(a+3)(a-1)]/(a^2-1)*4a^-4/3
=(4a^-4/3 )/(a^2-1)
7.(a-b/a+b-a+b/a-b)/(1- a^2+b^2/a^2-2ab+b^2)
=[-4ab/(a^2-b^2)]/[-2ab/(a-b)^2]
=2(a-b)^2/(a^2-b^2)
8.[(1+ 4/x-2)(x-4+ 4/x)-3]/(4/x -1)
={[(x^2-4)/x]-3}/[(4-x)/x]
=-x-1
9.[1/a^2 + 1/b^2 + (2/a+b)(1/a+1/b]/[(a+b)^2/ab]
=(1/a^2+1/b^2+2/ab)[ab/(a+b)^2]
=1/ab
10.已知x^2-3x+1=0求 1.x+1/x 2.x^2+1/x^2 3.x^4+1/x^4的值
x^2-3x+1=0,两边都除以x
得x+1/x=3
平方x^2+2+1/x^2=9
得x^2+1/x^2=7
同理x^4+1/x^4=47
11.化简x-2/x^9-9(1+ 2x-7/x^2-4x+4)/ 1/x+3 并求x=2006时的值
x-2/x^9-9(1+ 2x-7/x^2-4x+4)/ 1/x+3
这个题目你再写清楚点,实在不好做.
12.化简(x^2+4x+4/x^2-6x+9 -2+ 9-6x+x^2/4+4x+x^2)*x^2-x-6/4x^2-4x-1
=[5(2x-1)/(x-3)^2-5(2x-1)/(x+2)^2]*(x-3)(x+2)/(2x-1)^2
=25/(x+2)(x-3)
你X上面的小*不好理解
好乱,解法好多
Hao Ti!
第10题,x=(3±根号5)/2,两个根互为倒数,所以x1+x2=3,韦达定理
分式这样书写,不好理解
误解很多