Question

120 - x : 4 = 3⁴ : 3¹¹

Answer 1

120 - x : 4 = 3⁴ : 3¹¹

có sai đề ko bn chứ 3⁴ : 3¹¹ thì số mũ âm bn ak!!!

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Answer 2

\(120-\frac{x}{4}=3^4:3^{11}\)

\(\Rightarrow120-\frac{x}{4}=3^{4-11}\)

\(\Rightarrow120-\frac{x}{4}=3^{-7}\)

\(\Rightarrow120-\frac{x}{4}=\frac{1}{3^7}\)

\(\Rightarrow\frac{1}{3^7}+\frac{x}{4}=120\)

\(\Rightarrow\frac{x}{4}=10-\frac{1}{3^7}\approx120\)

\(\Rightarrow x\approx480\)