F4 maths
回答 (2)
2013-02-23 6:09 am
✔ 最佳答案
(-2)^887 = -(2^887)(1/2)^888 * (-2)^887
= -(1/2)^888 * 2^887
= -1/2
2013-02-23 7:00 am
(1/2)^888 · (-2)^887
= (1/2) · (1/2)^887 · (-2)^887
= (1/2) · (- 1)^887
= - 1/2
= (1/2) · (1/2)^887 · (-2)^887
= (1/2) · (- 1)^887
= - 1/2
收錄日期: 2021-04-21 22:26:13
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20130222000051KK00290