tập hợp các số nguyên được sắp xếp theo thứ tự tăng dần A . { 3 ; - 19 ; 5 ; 1 ; 0 ; - 3 } b , { - 3 ; - 19 ; 0 ; 1 ; 3 ; 5 } c , { 0 ; 1 ; - 3 ; 3 ; 5 ; - 19 } d , { - 19 ; - 3 ; 0 ; 1 ; 3 ; 5 } cho a = 2^3 . 3^4 . 5^3 , b = 2^2 . 3^3 . 5^2 ; c = 2^2 . 3^4 . 5^2 khi đó ƯCLN ( a ; b ; c ) bằng : A . 2^2 . 3^3 . 5^2 B . 2^3 . 3^4 . 5^3 C , 2 . 3^2 . 5 D , 2 . 3 . 5 Số I564a0 chia hết cho 2 ; 3 ; 5 và 9 thì chữ số a là A . 3 B . 2 C. 6 D . 9 cho AB = 12 cm ' AC = 17 cm ' BC = 5 cm khi đó A . Điểm A nằm giữa 2 điểm B và C B , Điểm B và C nằm cùng phía đối với A C , điểm C nằm giữa 2 điểm A và B D , Điểm A và B nằm khác phía đối C

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