Toán Lớp 6: (14-x)mũ 2=64,d 36chia hết cho x và x<10
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Toán Lớp 6: (14-x)mũ 2=64,d 36chia hết cho x và x<10
Comments ( 2 )
c){\left( {14 – x} \right)^2} = 64\\
\Rightarrow {\left( {14 – x} \right)^2} = {8^2}\\
\Rightarrow 14 – x = 8\\
\Rightarrow x = 6\\
d)\\
36 {\mathinner{\mkern2mu\raise1pt\hbox{.}\mkern2mu
\raise4pt\hbox{.}\mkern2mu\raise7pt\hbox{.}\mkern1mu}} x\\
\Rightarrow x \in {U_{\left( {36} \right)}}\\
{U_{\left( {36} \right)}} = \{ 1;\,2;\,3;\,4;\,6;\,12;\,18;\,36\} \\
ma\,\,x < 10\\
\Rightarrow x \in \{ 1;2;3;4;6\}
\end{array}\]