maths f,1

2007-05-23 5:23 am
x=1+ x+1除2 + x+1除4

要步驟,thzzz...
更新1:

吾系1除2,系x加左1之後除2!!! x+1都系,加左先除4*

回答 (3)

2007-05-23 6:38 am
✔ 最佳答案
x=1+ (x+1)/2 + (x+1)/4

4x= 4[1+(x+1)/2 + (x+1)/4]

4x=4+2(x+1)+(x+1)

4x=4+2x+2 +x + 1


4x-3x=7

x=7
2007-05-23 5:37 am
1除2 = 1/2 - =負數

x = 1+ x + 1/2 + x +1/4
x = 2x + 4/4 + 2/4 + 1/4 (1變4/4 , 1/4變2/4)
x = 2x + 7/4 (分子相加 4+2+1 / 4)
-x = 7/4
x = -7/4 (兩邊x -) < (假分數都可以做答案)
x = -1.75 < 答案
參考: Me
2007-05-23 5:33 am
x=1+x+1/2+x+1/4
x=1+x+0.5+x+0.25
x=1.75+2x
x-2x=1.75
(-x)= 1.75
(-x)(-1)=1.75(-1)
x= -1.75


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