1. 41781923
2. 43986977
3. 5802888573
更新1:
請列明過程，how do you find it? 不要說告訴我你是試數的。
更新2:
回答002，請你不要錯得這麼明顯： 41781923=347 43986977=353 5802888573=1797 還有，用計算機計出來的，即沒有過程者，不能成為最佳回答。
更新3:
意見001，我下次會的了，多謝提醒。
求立方根三題
回答 (4)
2010-07-17 9:42 pm
✔ 最佳答案
41781923=34743986977=353
5802888573=1797
方法是有的,不如我舉個例子,
19立方=6859
那麼可試試10立方=1000
20立方=8000
10立方>6859>20立方
然後可試試尾數,1立方=1
2立方=8
3立方=?7
4立方=?4
5立方=??5
6立方=??6
7立方=??3
8立方=??2
9立方=??9
因9立方=??9的尾數與6859一樣
所以6859的立方根是19
2010-07-17 14:31:33 補充：
我的方法是對的,沒有錯架!!!!!!!!!!!!!!!!!
參考: myself, myself
2010-07-17 11:51 pm
求以下各數的立方根：
1. 41781923
2. 43986977
3. 5802888573
ans:用四位對數表log&anti log
1.let x^3=41781923
logx 41781923=3
log 41781923 / log x =3
log x =log 41781923 / 3
x=anti log (log41781923 /3)
=347
2.let x^3=43986977
logx 43986977=3
log 43986977 / log x =3
log x =log 43986977 / 3
x=anti log (log43986977 /3)
=353
3.let x^3=5802888573
logx 5802888573=3
log 5802888573 / log x =3
log x =log 5802888573 / 3
x=anti log (log5802888573 /3)
=1797
駛唔借本用,sorry 我無...
1. 41781923
2. 43986977
3. 5802888573
ans:用四位對數表log&anti log
1.let x^3=41781923
logx 41781923=3
log 41781923 / log x =3
log x =log 41781923 / 3
x=anti log (log41781923 /3)
=347
2.let x^3=43986977
logx 43986977=3
log 43986977 / log x =3
log x =log 43986977 / 3
x=anti log (log43986977 /3)
=353
3.let x^3=5802888573
logx 5802888573=3
log 5802888573 / log x =3
log x =log 5802888573 / 3
x=anti log (log5802888573 /3)
=1797
駛唔借本用,sorry 我無...
2010-07-17 9:37 pm
咁你應該係題目標明「不可用計算機」吧!
2010-07-17 7:13 pm
1)41781923=347
2)43986977=353
3)5802888573=1797
i used calculator to find
i cannot think of other method
2)43986977=353
3)5802888573=1797
i used calculator to find
i cannot think of other method
收錄日期: 2021-04-22 00:50:07
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20100716000051KK01869