Tìm BCNN của:
a) 10, 12, 15 ; b) 8, 9, 11 ; c) 24, 40, 168
Giải:
a) \(10=2.5;12=2^2.3;15=3.5 \Rightarrow BCNN(10,12,15)=2^2.3.5=60.\)
b) \(8=2^3;9=3^2;11=1.11 \Rightarrow BCNN(8,9,11)=2^3.3^2.11=792.\)
c) \(24=2^3.2;40=2^3.5;168=2^3.3.7 \Rightarrow BCNN(24,40,168)=2^3.3.5.7=840\)
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