bcnn(21,42,84)
BCNN(21,42,84)=
BCNN(21,42,84)
Phân tích ra thừa số nguyên tố ta có :
21 = 3 x 7
42 = 2 x 3 x 7
84 = 22 x 3 x 7
=> BCNN ( 21 , 42 , 84 ) = 3 x 7 x 22 = 84
Tick tớ nhé bạn
21=3.7
42=2.3.7
84=2^2.3.7
BCNN(21,42,84)=2^2.3.7=84
tick cho mình nha
Vì 84 chia hết cho 21 ; 42 => BCNN(21;42;84)=84
BCNN(21,42,84)
BCNN của ba số đó là 84 , vì 84 chia hết cho cả ba số đó , ai tick mk thì mk tick lại cho nha các bạn , Lê Thảo Nhi ơi tick mk nha bạn thân !!!
BCNN(21;42;84)
21=7.3
42=3.2.7
84=3.2^2.7
=>BCNN(21;42;84)=7.3.22=84
21=7x3
42=7x3x2
84=7x3x4
BCNN(21,42,84)=7x3x2x4=168
BCNN(21,42,84)=
BCNN[21,42,84]
21 = 3.7
42 = 2.3.7
84 = 22.3.7
< = > BCNN(21 ; 42 ; 84) = 22.3.7 = 84
BCNN(21;42;84)
ta có:21=3.7
42=2.3.7
84=2^2.3.7
=>BCNN(21;42;84)=2^2.3.7=84
tick nha bạn
21
vì 21 , 48 , 84 đều chia hết cho 21
ai tick mik mik tick lại cko
cái này là BCNN mà, đâu phải ƯCLN đâu
BCNN 15;25 . b, ( ) BCNN 7;13 . c, ( ) BCNN 8;9;11 . a, ( ) BCNN 40;52 . b, ( ) BCNN 13;15 . c, ( ) BCNN 10;12;15 . a, ( ) BCNN 60;280 . b, ( ) BCNN 11;55 . c, ( ) BCNN 16;25;32 . a, ( ) BCNN 84;108 . b, ( ) BCNN 25;39 . c, ( ) BCNN 28;56;560 . a, ( ) BCNN 154;220 . b, ( ) BCNN 12;36 . c, ( ) BCNN 24;40;168 . a, ( ) BCNN 770;220 . b, ( ) BCNN 13;39 . c, ( ) BCNN 100;120;140 .
BCNN 15;25 . b, ( ) BCNN 7;13 . c, ( ) BCNN 8;9;11 . a, ( ) BCNN 40;52 . b, ( ) BCNN 13;15 . c, ( ) BCNN 10;12;15 . a, ( ) BCNN 60;280 . b, ( ) BCNN 11;55 . c, ( ) BCNN 16;25;32 . a, ( ) BCNN 84;108 . b, ( ) BCNN 25;39 . c, ( ) BCNN 28;56;560 . a, ( ) BCNN 154;220 . b, ( ) BCNN 12;36 . c, ( ) BCNN 24;40;168 . a, ( ) BCNN 770;220 . b, ( ) BCNN 13;39 . c, ( ) BCNN 100;120;140 .