Question

UCLN(45,840,150,900)=.....

Answer 1

Ta có: 45=3².5

840=2³.3.5.7

150=5².2.3

900=2².3².5²

Vậy ƯCLN(900;150;840)= 3.5=15

Answer 2

45=3^2*5           

840 = 2^3*3*5*7 

150= 2*3*5^2

900= 2^2*3^2*5^2

suy ra UCLN( 45,840,150 ,900  ) = 3*5=15