因式分解下列各式
1)16x2次-1
=?
要用surd form
2)sin30+tan45=?
3)cos45-sin60=?
4)cos45-sin45=?
5)tan30-cos30=?
概率(probability)
homg kong the probability that a new born baby is boy is 0.48
6)find the probability that a new born baby is a girl
=?
f.3 math 幫下我
2009-08-01 1:57 am
回答 (1)
2009-08-01 2:15 am
✔ 最佳答案
1)16x2-1=(4x)2-1
=(4x-1)(4x+1)
圖片參考：http://a.imagehost.org/0635/ScreenHunter_07_Jul_31_18_12.gif
6)
P(new born baby is a girl)=1-0.48
=0.52
收錄日期: 2021-04-23 20:44:03
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20090731000051KK01581