Trắc nghiệm: a + b + c,(A∪B)\C,a b c,a=b=c,a+ b + c,A + B + C,A - B - C,a // b // c,A B C,A B C,A B C,A B C,A B C,A B C,A B C,A B C,A B C,A B C,A B C,A B C,A B C,A B C,A B C,A B C,A B C,A B C,A B C,A B C,A B C,A B C,A B C,A B C,A B C,A B C,A B C,A B C,a = …; b’ = …; c = …;,-A + B + C.,a + b + c = ………………,a) B^=C^,a – b – c = …………………………..,a × b × c = …………………………..,(a + b) + c,a + (b + c),(a + b) × c,A + B → C.,a + (b + c) = ......................;,a + (b – c) = .......................,a – (b + c) = ......................;,A B C,A B C,A B C,a) ……………………. b)………………… c)………………………….,a) ……………………. b)………………… c)………………………….,a) ……………………. b)………………… c)………………………….,a) ……………………… b) ………………… c) …………………,a)…………………………. b)……………………… c)……………………….,a)…………………………. b)……………………… c)……………………….,a) B – C;,(a : b)c,A B C,A B C,A B C,A B C,A B C,A B C,A B C,a.