Odd little function.
Difficulty: Moderate. How do primes get involved?
Difficulty: Combinations annoy me.
Standard instructions for this series: No calculator allowed. Express
answers in reduced form. Rationalize denominators. Radicals must be
reduced. All numbers are base ten unless otherwise specified. Do not
approximate radicals or π. Leave such answers as 1025π or √39, for
example. Source: UVM Math Contest
answer 19 and
answer 25.
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