幼儿绘画构图法则:解因式方程：x-4/x-5+x-8/x-9=x-7/x-8+x-5/x-6

来源：百度文库 编辑：神马品牌网 时间：2024/04/29 22:18:21

解:(x-4)/(x-5)+(x-8)/(x-9)=(x-7)/(x-8)+(x-5)/(x-6)
1+1/(x-5)+1+1/(x-9)=1+1/(x-8)+1+1/(x-6)
1/(x-5)+1/(x-9)=1/(x-8)+1/(x-6)
(2x-14)/[(x-5)(x-9)]=(2x-14)/[(x-8)(x-6)]
当x≠7时,
(x-5)(x-9)=(x-8)(x-6)
-14x+45=-14x+48
45=48
∵45≠48
∴x=7

好强

(x-4)/(x-5)+(x-8)/(x-9)=(x-7)/(x-8)+(x-5)/(x-6)

[1+1/(x-5)]+[1+1/(x-9)]=[1+1/(x-8)]+[1+1/(x-6)]

1/(x-5)+1/(x-9)=1/(x-8)+1/(x-6)

1/(x-5)-1/(x-6)=1/(x-8)-1/(x-9)

-1/[(x-5)(x-6)]=-1/[(x-8)(x-9)]

(x-5)(x-6)=(x-8)(x-9)

x^2-11x+30=x^2-17x+72

6x=42

x=7

(x-4)/(x-5)+(x-8)/(x-9)=(x-7)/(x-8)+(x-5)/(x-6)
[1+1/(x-5)]+[1+1/(x-9)]=[1+1/(x-8)]+[1+1/(x-6)]
1/(x-5)+1/(x-9)=1/(x-8)+1/(x-6)
1/(x-5)-1/(x-6)=1/(x-8)-1/(x-9)
-1/[(x-5)(x-6)]=-1/[(x-8)(x-9)]
(x-5)(x-6)=(x-8)(x-9)
x^2-11x+30=x^2-17x+72
6x=42
x=7

解因式方程：x-4/x-5+x-8/x-9=x-7/x-8+x-5/x-6 方程(x+1/x+2)+(x+2/x+3)=(x+3/x+4)+(x+4/x+5)的解 解方程3^x+4^x=5^x 方程3^x+4^x=5^x怎么解 分解因式：x^5+x^2+x 解方程:x/2x-3+5/3-2x=4 解方程(x+1)(x+2)(x+3)(x+4)=(x+1)(x+1)+(x+2)(x+2)+(x+3)(x+3)+(x+4)(x+4) 分解因式：x^4-6x^3-2x^2+18x+23/x^3-7x^2+5x+15 解方程5/5x^2+x=1/x^2+x 解方程：5/(x^2+x)-1/(x^2-x)=0