Toán Lớp 6: nếu M =12a+14b thì
A )M:4
B )M:2
C )M : 12
D ) M :14
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Toán Lớp 6: nếu M =12a+14b thì
A )M:4
B )M:2
C )M : 12
D ) M :14
Comments ( 2 )
M{\rm{ }} = 12a + 14b\\
a)M\,\, \vdots \,\,4\\
ta\,\,co:\left\{ \begin{array}{l}
12 \vdots 4\\
14\,\,khong\,\, \vdots \,\,4
\end{array} \right. \Rightarrow \left( L \right)\\
b)M \vdots 2\\
ta\,\,co:\left\{ \begin{array}{l}
12 \vdots 2\\
14 \vdots 2
\end{array} \right. \Rightarrow \left( N \right)\\
c)M \vdots 12\\
ta\,\,co:\left\{ \begin{array}{l}
12 \vdots 12\\
14\,\,khong\,\, \vdots \,\,12
\end{array} \right. \Rightarrow \left( L \right)\\
d)M \vdots 14\\
ta\,\,co:\left\{ \begin{array}{l}
12\,\,khong\,\, \vdots \,\,14\\
14 \vdots 14
\end{array} \right. \Rightarrow \left( L \right)\\
\Rightarrow B)M \vdots 2
\end{array}\]