Maths F.2!!!

🎓 學業台教學

123

2008-12-27 11:35 pm

Simplify the following and rationalize the donominator of the answer.

√18 ×√14×√12
-----------------------
√60

更新1:

√ 是平方根的符號!!!

更新2:

Show clear step!!!

回答 (1)

用戶22403

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

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