2^n+1 + 2^n
5^n+1 - 5^n
解一解... please
THx
數學指數加減
2013-04-04 1:19 am
回答 (2)
2013-04-04 1:44 am
✔ 最佳答案
2^(n+1)+2^n=2^n*(2+1)
=3*2^n
5^(n+1)－5^n
=5^n*(5－1)
=4*5^n
2013-04-04 4:34 am
2^n+1 + 2^n
=2^n *2 +2^n
=2^n(2+1)
=3*2^n
5^n+1 - 5^n
=5^n *5 -5^n
=5^n (5-1)
4* 5^n
=2^n *2 +2^n
=2^n(2+1)
=3*2^n
5^n+1 - 5^n
=5^n *5 -5^n
=5^n (5-1)
4* 5^n
收錄日期: 2021-04-13 19:24:27
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20130403000051KK00298