Question

Решите уравнение log 1/3 (4x+1)=-2

Answer 1

$log_{ \frac{1}{3} } 4x+1= log_{ \frac{1}{3} }9$
4x+1=9
4x=9-1
4x=8
x=8/4
x=2

Answer 2

$\log_{1/3}(4x+1)=-2 \\ 4x+1=(\frac{1}{3})^{-2}=9\\ 4x=8 \\ x=2$