√18 ×√14×√12
-----------------------
√60
更新1:
√ 是平方根的符號!!!
更新2:
Show clear step!!!
Maths F.2!!!
2008-12-27 11:35 pm
Simplify the following and rationalize the donominator of the answer.
√18 ×√14×√12
-----------------------
√60
√18 ×√14×√12
-----------------------
√60
回答 (1)
2008-12-28 1:26 am
✔ 最佳答案
√18 ×√14×√12-----------------------
√60
= [√(2x3x3) x √ (2x7) x √ 12] / [√ (12x5)]
= [ (3√ 2) x (√ 2) x (√ 7) ] / (√ 5)
= (3x2x√ 7) / (√ 5)
6√ 7
= ----------
√ 5
2008-12-27 17:30:16 補充：
漏左幾步....
= (6√ 7) / (√ 5)
= (6x√ 7x √ 5) / (√ 5x√ 5)
= (6√ 35) / 5
收錄日期: 2021-04-23 23:16:44
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20081227000051KK01051