a: \(ƯCLN\left(3\cdot5^2;7\cdot5^2\right)=5^2=25\)
\(BCNN\left(3\cdot5^2;7\cdot5^2\right)=5^2\cdot3\cdot7=25\cdot21=525\)
b: \(ƯCLN\left(2^2\cdot3\cdot5;3^2\cdot7;3\cdot5\cdot11\right)=3\)
\(BCNN\left(4\cdot3\cdot5;9\cdot7;15\cdot11\right)=13860\)
a) ƯCLN(3.5²; 5².7) = 5² = 25
BCNN(3.5²; 5².7) = 3.5².7 = 525
b) ƯCLN(2².3
5; 3².7; 3.5.11) = 3
BCNN(2².3.5; 3².7; 3.5.11) = 2².3².5.7.11 = 13860
`a, (3.5^2, 5^2.7) = 25`.
`[3.5^2, 5^2.7] = 525`
`b, (2^2.3.5, 3^2.7, 3.5.11) = 3`
`[2^2.3.5, 3^2.7, 3.5.11] = 13860`
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