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| Powers Of 7, Powers Of 2 (Posted on 2007-08-30) |
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Determine all pairs of primes (m, n) for which (7 m - 2 m)(7 n - 2 n)/(mn) is an integer.
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Submitted by K Sengupta
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Rating: 3.7500 (4 votes)
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Solution:
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(Hide)
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(m, n) = (5, 5), (5, 11), (5, 61) gives all possible ordered prime pairs that satisfy condiions of the problem..
EXPLANATION:
Refer to the solution posted by Praneeth in this location.
Source: ASK DR. MATH forum.
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