各位大大，我要問一個國二數學問題，就是【根號15】然後用十分逼近法取近值然後怎麼用直式算，拜託各位可以寫給我看嗎?
回答 (2)
2016-09-28 6:20 am
Sol
A=√15
3^2=9
4^2=16
3<A<4
3.8^2=14.44
3.9^2=15.21
3.8<A<3.9
3.87^2=14.9769
3.88^2=15.054
3.87<A<3.88
3.872^2=14.992384
3.873^2=15.000129
3.872<A<3.873
3.8729^2=14.999354
A～3.8729
A=√15
3^2=9
4^2=16
3<A<4
3.8^2=14.44
3.9^2=15.21
3.8<A<3.9
3.87^2=14.9769
3.88^2=15.054
3.87<A<3.88
3.872^2=14.992384
3.873^2=15.000129
3.872<A<3.873
3.8729^2=14.999354
A～3.8729
2016-09-28 10:29 am
x=√15
3^2=9
4^2=16
3<√15<4
3.8^2=14.44
3.9^2=15.21
3.8<x<3.9
3.87^2=14.9769
3.88^2=15.054
3.87<x<3.88
3.872^2=14.992384
3.873^2=15.000129
3.872<x<3.873
3.8729^2=14.999354
x～3.8729
3^2=9
4^2=16
3<√15<4
3.8^2=14.44
3.9^2=15.21
3.8<x<3.9
3.87^2=14.9769
3.88^2=15.054
3.87<x<3.88
3.872^2=14.992384
3.873^2=15.000129
3.872<x<3.873
3.8729^2=14.999354
x～3.8729
收錄日期: 2021-04-30 21:59:34
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20160927204200AAXq70b