1,-1,1,-1,1,-1...
The general tern is......
Math F.1
2006-10-20 5:21 am
回答 (4)
2006-10-20 5:26 am
✔ 最佳答案
(-1)^(n+1) for n=1,2,....or
(-1)^n for n = 0,1,2,...
2006-10-21 7:08 pm
The general tern is...... -1既n次方:
n
-1
n
-1
2006-10-20 5:59 am
The general term is (-1)^(n+1)
when n=1
(-1)^(1+1) = (-1)^2 = 1
when n=2
(-1)^(2+1) = (-1)^3 = -1
when n=3
(-1)^(3+1) = (-1)^4 = 1
and so on
when n=1
(-1)^(1+1) = (-1)^2 = 1
when n=2
(-1)^(2+1) = (-1)^3 = -1
when n=3
(-1)^(3+1) = (-1)^4 = 1
and so on
2006-10-20 5:44 am
1.-1.1.-1.1.-1....
第6頂:(n=6)=(-1)的6次方＝
（－１）ｘ（－１）ｘ（－１）ｘ（－１）ｘ（－１）ｘ（－１）＝＋１＝１
第7頂:(n=7)=(-1)的７次方＝
（－１）ｘ（－１）ｘ（－１）ｘ（－１）ｘ（－１）ｘ（－１）ｘ（－１）＝－１
通頂=(-1)的n次方
2006-10-19 21:46:55 補充：
ｓｏｒｒｙ！！是第６項．第７項和通項！！ｓｏｒｒｙ！！！
第6頂:(n=6)=(-1)的6次方＝
（－１）ｘ（－１）ｘ（－１）ｘ（－１）ｘ（－１）ｘ（－１）＝＋１＝１
第7頂:(n=7)=(-1)的７次方＝
（－１）ｘ（－１）ｘ（－１）ｘ（－１）ｘ（－１）ｘ（－１）ｘ（－１）＝－１
通頂=(-1)的n次方
2006-10-19 21:46:55 補充：
ｓｏｒｒｙ！！是第６項．第７項和通項！！ｓｏｒｒｙ！！！
參考: ｍｅ
收錄日期: 2021-04-13 15:56:42
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20061019000051KK04287