Question

3 ^ (x - 1) + 3 ^ (x + 2) = 90

Помогите :3​

Answer 1

Пошаговое объяснение:

${3}^{x - 1} + {3}^{x + 2} = 90$

$\frac{28y}{3} = 90$

$y = \frac{135}{14}$

${3}^{x} = \frac{135}{14}$

$x = \frac{log( \frac{135}{14} }{log(3)}$