√18 點=3√2
√72點=6√2
一時忘記點計,
請解釋清楚
simple math
2007-08-03 8:34 am
回答 (2)
2007-08-03 8:39 am
√18 = √(2*3*3) [將個數化開]
= √2*√(3*3)
= √2 * 3 [因為 √ (3*3) = 3]
= 3√2
2007-08-03 00:44:53 補充：
√72 原理一樣= √(36*2)= √36 * √2= 6√2
= √2*√(3*3)
= √2 * 3 [因為 √ (3*3) = 3]
= 3√2
2007-08-03 00:44:53 補充：
√72 原理一樣= √(36*2)= √36 * √2= 6√2
收錄日期: 2021-04-12 20:55:32
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20070803000051KK00192