Question

8 :' x , 12 :' x , 24 :' x

b) 24 :' x , 30 :' x

c) 42 :' x , 58 :' x

giúp e

 

Answer 1

8 ⋮ \(x\);  12 ⋮  \(x\);  24 ⋮ \(x\) ⇒ 8; 12; 24 ⋮ \(x\) ⇒ \(x\) \(\in\) ƯC(8;12;24)

8 = 2³; 12 = 2².3; 24 = 2².3

ƯCLN(8; 12; 24) =  2² = 4

\(x\) \(\in\) {-4;  -2; -1; 1; 2; 4}

 

Answer 2

a) 4
b) 6
c) 2

 

Answer 3

b, 24 ⋮ \(x\); 30 ⋮ \(x\) ⇒ \(x\) \(\in\) ƯC(24; 30) 

24 = 2³.3; 30 = 2.3.5 ⇒ ƯCLN(24; 30) = 2.3 = 6

\(x\) \(\in\) Ư(6) = {-6; -3; -2; -1; 1; 2; 3; 6}

Answer 4

c, 42⋮ \(x\); 58 ⋮ \(x\) ⇒ \(x\) \(\in\) ƯC(42;58) 

42 = 2.3.7; 58 = 2.29 ⇒ ƯCLN(42; 58) = 2

\(x\) \(\in\) Ư(2) = {-2; -1; 1; 2}