Maths

👨🏻‍🏫 學術台數學

知識就是力量

2009-12-31 2:50 am

Given that 4^a = 25^b = 10. Find the value of 1/a + 1/b

回答 (2)

用戶9112

2009-12-31 2:54 am

✔ 最佳答案

4^a = 10
alog4 = 1
1/a = log4
25^b = 10
blog25 = 1
1/b = log25
1/a + 1/b = log4 + log 25 = log 100 = 2

2009-12-30 20:12:25 補充：
我對ღ.｡.:* 知識就是力量╭★ 很有信心.

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匿名

2009-12-31 3:44 am

感覺上是在抄人= =|||

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