TL :
ƯCLN( 18 ; 45 ; 36 )
Ta có :
18 = 2 . 32
45 = 32 . 5
36 = 22 . 32
=> ƯCLN( 18 ; 45 ; 36 ) = 32 = 9
ƯCLN( 25 ; 125 ; 75 )
Ta có :
25 = 52
125 = 53
75 = 3 . 52
=> ƯCLN( 25 ; 125 ; 75 ) = 52 = 25
UCLL(18,45,36)
\(18=2\times3^2\)
\(45=3^2\times5\)
\(36=2^2\times3^2\)
UCLL(18,45,36)=\(3^2=9\)
UCLL(25,125,75)
\(25=5^2\)
\(125=5^3\)
\(75=3\times5^2\)
UCLL(25,125,75)=\(5^2=25\)