Toán Lớp 7: (-3/4)^3x-1=81/256 tìm x bạn eiii
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Toán Lớp 7: (-3/4)^3x-1=81/256 tìm x bạn eiii
Comments ( 2 )
{{{\left( { – \dfrac{3}{4}} \right)}^{3x – 1}} = \dfrac{{81}}{{256}} = {{\left( {\dfrac{3}{4}} \right)}^4}}\\
{ \Rightarrow 3x – 1 = 4}\\
{ \Rightarrow x = \dfrac{5}{3}}
\end{array}$