Collaborative Mathematics: Challenge 15

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I’m a few months late with this, but my colleague Jason Ermer at Collaborative Mathematics has published Challenge 15 on his website: http://www.collaborativemathematics.org/challenge15.html

His website also has some follow-up challenge questions.

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Published by John Quintanilla

I'm a Professor of Mathematics and a University Distinguished Teaching Professor at the University of North Texas. For eight years, I was co-director of Teach North Texas, UNT's program for preparing secondary teachers of mathematics and science.

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