Toán Lớp 6: tìm số tự nhiên x:2 mũ 2.(2x+2 mũ 3x)-3 mũ 37:3 mũ 36=37
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Toán Lớp 6: tìm số tự nhiên x:2 mũ 2.(2x+2 mũ 3x)-3 mũ 37:3 mũ 36=37
Comments ( 1 )
{2^2}.\left( {2x + {2^{3x}}} \right) – {3^{37}}:{3^{36}} = 37\\
\Leftrightarrow 4.\left( {2x + {2^{3x}}} \right) – 3 = 37\\
\Leftrightarrow 4.\left( {2x + {2^{3x}}} \right) = 40\\
\Leftrightarrow \left( {2x + {2^{3x}}} \right) = 10\\
\Leftrightarrow 2x + {2^{3x}} = 2 + {2^3}\\
\Leftrightarrow x = 1\\
Vậy\,x = 1
\end{array}$