若12345678的平方-2345678的平方=k,則k是幾位數?

2018-07-07 9:27 am

回答 (2)

2018-07-07 1:49 pm
Sol
12345678^2-2345678^2
=(12345678-2345678)*(12345678+2345678)
=10000000*14691356
=146913560000000
15位數
2018-07-07 9:39 am
15次方,12345678平=152415765279684,-2345678=152415762934006


收錄日期: 2021-04-30 22:41:01
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20180707012711AARbRvJ

檢視 Wayback Machine 備份