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1)
75|3 15|3 30|2
25|5 5|5 15|3
5|5 1| 5|5
1| 1|
75=3×5²×1
15=3×5×1
30=2×3×5×1
El mínimo común múltiplo será igual al producto de los factores no comunes y de los comunes el elevado al mayor exponente
mcm(75,15,30)=2×3×5²×1 = 150
2)
mcm(12,17,25)
12=2²×3×1
17=17×1
25=5²
mcm(12,17,25)=2²×3×5²×17×1= 5.100
3)
mcm(32,60,18)
32=2⁵×1
60=2²×3×5
18=2×3²×1
mcm(32,60,18)=2⁵×3²×5×1=1.440