Maths help, thanks?

👨🏻‍🏫 學術台數學

Smile

2017-03-10 11:54 am

If log 4=m, express log 125 in terms of m.?
i do not understand why the answer is 3 - 3m/2

回答 (3)

ted s

2017-03-10 12:09 pm

✔ 最佳答案

125 = 1000 / 8 = 10³ / 4^(3/2)

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用戶48836

2017-03-10 12:05 pm

m = log(4) = 2 log(2)
log(2) = m/2

125 = 1000/8 = 10³/2³
log(125) = log(1000)-3 log(2)
= 3-3m/2

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[匿名]

2017-03-10 5:44 pm

Edit: sorry, just realized, someone already gave the right answer

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