唔該教我計呢2條,請例明步驟:
1. (2^(2n+1)+7(2^n))/(4(2^n))
2. (9(4^n)-3(2^(n+1)))/(5(2^(n-1)))
中三數學--指數定律
2007-10-23 3:31 am
回答 (2)
2007-10-23 3:46 am
✔ 最佳答案
1. =2^n(9)/2^n(4)=9/4
未必岩→2. =9(2^2n)-3(2^n+1) / 5(2^n-1)
=2^n-1(9*2^n+1) - 3(4))/5(2^n-1)
=9(2^n+1) - 12 / 5
=3((2n+1)-4) / 5
參考: 自己
2007-10-28 7:00 pm
2^(2n+1)=2^2n * 2
2^2n 唔=2^n
想問上面果個人點解可以將2^2n 同2^n 一齊約?
2^2n 唔=2^n
想問上面果個人點解可以將2^2n 同2^n 一齊約?
收錄日期: 2021-04-13 14:58:25
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