The answer to exercise marked [BB] can be found in the Back of the Book.
Let a and b be nonzero integers with lcm (a, b) = ℓ. Let m be any common multiple of a and b. Prove that ℓ | m.
We need at least 10 more requests to produce the solution.
0 / 10 have requested this problem solution
The more requests, the faster the answer.