3 Let and be positive integers, no two of which have a common divisor greater than . Show that is the largest integer which cannot be expressed in the form, where are non-negative integers.
3 Hayaan at maging positive integers, walang dalawa na may isang pangkaraniwang panghati mas malaki kaysa sa . Ipakita na ay ang pinakamalaking integer na kung saan ay hindi maaaring ipinahayag sa form, Kung saan ay di-negatibong integers.