Question

expliquenmelo​ porfavor​

Answer 1

${2}^{x} - \frac{ {2}^{x} }{2} - \frac{ {2}^{x} }{4} - \frac{ {2}^{x} }{8} = 15 \\ {2}^{x} (1 - \frac{1}{2} - \frac{1}{4} - \frac{1}{8} ) = 15 \\ {2}^{x} ( \frac{1}{8} ) = 15 \\ {2}^{x} = 120 \\ te \: piden \: \frac{ {2}^{x} }{6} = \frac{120}{6} = 20$