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Say (mn + 1)| 24 (| denotes divisibility of 24 by mn + 1). Now, since 24 = 2.2.2.3, we must have:(mn + 1)| 2 or (mn + 1)| 3.In the former case: mn + 1 = 2, since 2 is prime and mn + 1 > 1. So mn = 1.In the latter case, similarly, mn + 1 = 3, so mn = 2. In either case, mn | 24.
Say (mn + 1)| 24 (| denotes divisibility of 24 by mn + 1). Now, since 24 = 2.2.2.3, we must have:
ReplyDelete(mn + 1)| 2 or (mn + 1)| 3.
In the former case: mn + 1 = 2, since 2 is prime and mn + 1 > 1. So mn = 1.
In the latter case, similarly, mn + 1 = 3, so mn = 2.
In either case, mn | 24.