Question

Cho \(a=45;b=204;c=126\)

a) Tìm ƯCLN (a, b, c)

b) Tìm BCNN (a, b)

Answer 1

a) \(ƯCLN\left(a,b,c\right)=3\)

b) \(BCNN\left(a,b\right)=3060\)

Answer 2

Ta có:

a) ƯCLN (a;b;c) = 3

b)

Answer 3

Ta có:

45 = 3² . 5 204 = 2² . 3 . 17 126 = 2 . 3² . 7

a, ƯCLN ( 45, 204, 126 ) = 3

b, BCNN ( 45, 204, 126 ) = 3² . 2² . 5 . 17 = 3060

Answer 4

Ta có: $45=3^2.5$

$204=2^2.3.17$

$126={2.3}^2.7$

a) ƯCLN (45; 204; 126) = 3

b) $BCNN(45;204)=2^2{.3}^2.5.17=3060$