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Area Man Who Talks a Lot About Teaching Teaches His First Full Day in >10
Years
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I have taught demo and observational classes regularly since I left
full-time teaching but yesterday was the first time I taught every class
for the day. L...
2 years ago
How about f(x) = |x|^\sqrt{2}?
ReplyDeleteSince we take the absolute value before exponentiating to an irrational power, f is defined for each real number x.
Also, f(f(x)) = ||x|^\sqrt{2}|^\sqrt{2} = (|x|^\sqrt{2})^sqrt{2} = x^2.