perplexus.info :: Just Math : Positively Real

Positively Real (Posted on 2012-09-09)

R⁺denotes the set of positive real numbers.

Determine all possible functions f:R⁺→ R⁺ such that:

f(f(x)) = 12x - f(x) for all x > 0.

No Solution Yet Submitted by K Sengupta

Rating: 5.0000 (1 votes)

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Subject	Author	Date
re: Explanation of my solution.	Steve Herman	2012-09-10 08:46:21
Explanation of my solution.	Chris, PhD	2012-09-10 06:02:57
Possible solution	Steve Herman	2012-09-09 20:21:44
Possible Answer	Chris, PhD	2012-09-09 18:44:18

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