maths~~~~
2010-03-12 2:47 am
If a is a positive integer and the integral part of √a is 2,then the integral part of √(3a) can be
回答 (1)
2010-03-12 8:14 am
✔ 最佳答案
√a=2.XXXXXXXthen a may be 5 , 6 , 7 and 8
then 3a may be 15 , 18 , 21 and 24
√15=3.87 , √18 = 4.24 , √21 = 4.58 , √24= 4.899
so the integral part of √3a can be 3 or 4
收錄日期: 2021-04-23 20:46:13
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20100311000051KK01008