唔好意思...我唔識打呢d問題出黎
想答的各位...唔該...
http://www.uwants.com/viewthread.php?tid=8669633
f.3 math 好急!!!!!! part 5 20分!
2009-09-02 2:06 am
回答 (1)
2009-09-02 2:14 am
✔ 最佳答案
12. 9n+4 / (3n+1)2= 32(n+4) / 32(n+1)
= 32(n+4) - 2(n+1)
= 36
= 729
13. 253-n / (5-1)2n
= 52(3-n) / 5-(2n)
= 52(3-n) - [-(2n)]
= 56
= 15 625
14. [8n-1 X (2n)2] / [4n X 23n+4]
= [23(n-1) X 22n] / [22n X 23n+4]
= 23(n-1) + 2n - 2n - (3n+4)
= 2-7
= 1/128
15. [81n X 9n+3] / (32n+1)3
= [34n X 32(n+3)] / 33(2n+1)
= 34n + 2(n+3) - 3(2n+1)
= 33
= 27
參考: Physics king
收錄日期: 2021-04-19 15:17:43
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20090901000051KK01159