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Function with a Modular Inverse
For a combinatorics problem I have a function, $h(x)$ that is always divisible by five, but it is calculated in pieces, e.g. $h(1) = 43 + 7$.
The final function that I need is $f(x) = (h(x) / 5) ...
3
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1answer
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Counting fractions with $n$ digits in the numerator and denominator
Playing around with fractions, I eventually had to consider the following question:
Is there a formula for counting how many proper fractions in lowest terms with
$n$ base-$b$ digits in both the ...
