Դասարանում
247. |A|+|B|=|A U B|+|A Ո B|
4+|B|=13+3
|B|=12
248. A={3, 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, 36, 39, 42, 45, 48}
B={5, 10, 15, 20, 25, 30, 35, 40, 45, 50}
A Ո B={15, 30, 45}
A U B={3, 5, 6, 9, 10, 12, 15, 18, 20, 21, 24, 25, 27, 30, 33, 35, 36, 39, 40, 42, 45, 48, 50}
249. 15+17=32
32-25=7
Տանը
240.
242.
243.
244.
୨ৎ Արփի Փիրումյան 𝜗ৎ 