f4 open-ended question

👨🏻‍🏫 學術台數學

[匿名]

2012-01-31 9:33 pm

construct a logarithmic function such that f(5)=2

更新1:

竟然成8個人贊助=.="

更新2:

sor,所謂既logarithmic function唔係指 y=log_a(x) 咩? 個x variable 可以做power?

回答 (1)

用戶2053

2012-01-31 9:54 pm

✔ 最佳答案

f(n) = log 10ⁿ⁻³
f(5) = log 10⁵⁻³ = log 10² = 2

2012-01-31 17:24:34 補充：
x variable 做power 應沒問題,反正log 10ⁿ⁻³ 是 logarithmic function.

那再作一個不用power的吧 :

f(n) = log 20n

f(5) = log (20*5) = log100 = 2

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