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Discussion of Problem 1776. Anniversary Firework

Ibragim Atadjanov (Tashkent U of IT) Which of these formulas correct for this problem? // Problem 1776. Anniversary Firework 27 Oct 2010 16:24
Which of these formulas correct for this problem
1. M(A) + M(B) - M(AB)
2. M(A)*M(B/A)

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