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Cau 2: Co bn ço nguyên dươngnđể ns - 8n? r20n413 la so- Joriers h a tho A=2 + 2y + 2ny - 21 t Qy +2. Tim GIN ala A? nguyên to: 2 - 26 Cau S: a,b7c ra,b,c #0) va (a +6+c) t)= Tim gia trị aa Ac (ato4t 1)=1 a 10イチ よイチ 2019 2021