f2maths.

2009-01-25 8:26 pm
1. b= c/1-x [x]

2. x= bE/L+ut [b]

3. A= 3bt-1 A=26 b=9 [t]

4. A=se/s+e A=3 e=4 [s]

5. L=3a+u/2b L=30 a=8 u=6 [b]

要答案,,

回答 (1)

2009-01-25 9:06 pm
✔ 最佳答案

圖片參考:http://f.imagehost.org/0642/ScreenHunter_03_Jan_24_03_51.gif

3. A= 3bt-1
26=3(9)t-1
26=27t-1
27=27t
t=1


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