2008-12-29 01:25 PM
lilypolly
[改左] 問數 [求積法-.-]
一款model 車與實物的長度之比為 1:24. 若實物中的擋風玻璃面積是 1m^2, 求model 車的擋風玻璃面積, 答案以cm^2為單位
[[i] 本帖最後由 lilypolly 於 2008-12-29 10:44 PM 編輯 [/i]]
2008-12-29 01:45 PM
XDD
3^x+3^x-1=4
3^x(1+3^-1)=4
3^x=3
so x=1
唔知岩唔岩= =
2008-12-29 01:48 PM
藍`
唔知係唔係咁呢@@''
計錯左唔好怪我呀。
3^x+3^x-1 = 4
3^x+3^x * 1/3 = 4
3^x(1+1/3) = 4
3^x(4/3) = 4
3^x = 4* 3/4
3^x =3
x =1
2008-12-29 03:35 PM
lilypolly
以上2位仁兄好勁-.-
2008-12-29 03:35 PM
話說從前
亂黎的- -
(9953.5-8500)/4.5/100%
=3.23%
2008-12-29 03:52 PM
lilypolly
回覆 #5 話說從前 的帖子
錯, 係3.8% (答案的-.-)
2008-12-29 03:55 PM
kelvinNg
(9953.5-8500)/8500/4.5=0.038
2008-12-29 03:59 PM
kelvinNg
240/(0.06-0.02)
2008-12-29 04:02 PM
kelvinNg
4x((square root((80000+2418)/80000))-1)
2008-12-29 07:46 PM
w1ngYaN!`
回覆 #9 kelvinNg 的帖子
你好呃p0牙:em35:
2008-12-29 08:27 PM
kelvinNg
我都費時編輯
2008-12-29 10:45 PM
lilypolly
回覆 #9 kelvinNg 的帖子
好亂-0-
眼花-0-
2008-12-30 08:00 AM
w1ngYaN!`
回覆 #11 kelvinNg 的帖子
我要扣你分:em35:
2008-12-30 06:18 PM
kelvinNg
let x be the area of the actual glasses of the car
(1/24)^2=1/x
x=576(cm^2)
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