Question

Найти корень уравнения
(1/3)^х-9=1/81
(1/2)^15-х=16

Answer 1

$(\frac{1}{3})^{x-9}=(\frac{1}{3})^3$

x-9=3

x=12

$(\frac{1}{2})^{15-x}=(\frac{1}{2})^{-4}$

15-x=-4

x=19