1) \(\frac{1}{7} \cdot 3^{x+1} + \frac{1}{2} \cdot 3^{x+2} = \frac{23}{14} \cdot 3^5\) 2) \(\frac{4^{x+3}}{5} + \frac{4^{x+1}}{7} = \frac{4^5 \cdot 117}{35}\) 3) \(\left( \frac{1}{20} - \frac{1}{5} \right) 2^{x+1} + 2^{x+2} = \frac{-148}{5}\)
----- Nội dung dịch tự động từ ảnh -----
1) \(\frac{1}{7} \cdot 3^{x+1} + \frac{1}{2} \cdot 3^{x+2} = \frac{23}{14} \cdot 3^5\)
2) \(\frac{4^{x+3}}{5} + \frac{4^{x+1}}{7} = \frac{4^5 \cdot 117}{35}\)
3) \(\left( \frac{1}{20} - \frac{1}{5} \right) 2^{x+1} + 2^{x+2} = \frac{-148}{5}\)
4) \(5^{x+3} + \frac{5}{6} \cdot 5^{x+4} = \frac{275}{2}\)