Dear all,
Could you please kindly help to show me the equation and explain me the
reason of below question ?
Q. Evaluate (+1) + (-2) + (+3) + (-4) +....... + (+49) + (-50).
Thank you very much!
Maths
2010-09-26 10:39 pm
回答 (2)
2010-09-26 11:09 pm
✔ 最佳答案
(+1) + (-2) + (+3) - (-4) +...+ (+49) + (-50) = (1-2) + (3-4) +... +(49-50)
= -1(25)
= -25
參考: me
2010-09-26 11:01 pm
the answer is - 25
收錄日期: 2021-04-21 22:31:58
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20100926000051KK00922