Question

Решите уравнение:
8*3^х-3^х-1=45

Answer 1

$8*3^x-3^{x-1}=45\3^{x-1}(8*3-1)=45\3^{x-1}*23=45\3^{x-1}=frac{45}{23}\3^{x-1}=3^{log_3frac{45}{23}}\x-1=log_3frac{45}{23}\x=log_3frac{45}{23}-1$