nakiyapulley7466
08.10.2019 •
Mathematics
How many positive integers $n$ satisfy $127 \equiv 7 \pmod{n}$? $n=1$ is allowed.
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Ответ:
Now,
is the same as saying there exists some integer such that
We have
which means that any that satisfies the modular equivalence must be a divisor of 120, of which there are 16: .
In the cases where the modulus is smaller than the remainder 7, we can see that the equivalence still holds. For instance,
(If we're allowing , then I see no reason we shouldn't also allow 2, 3, 4, 5, 6.)
Ответ:
is this go math book?