Нужна помощь с логарифмами, объясните как решить

A) [latex]log_{2}x\ \textgreater \ 2 \\ x\ \textgreater \ 0 \\ log_{2}x\ \textgreater \ log_{2}2^2 \\ x\ \textgreater \ 2^2 \\ x\ \textgreater \ 4[/latex] x∈(4; +∞)  (1) A - 1 Б) [latex]log_{2}x\ \textless \ -2 \\ x\ \textgreater \ 0 \\ log_{2}x\ \textless \ log_{2}2^{-2} \\ x\ \textless \ 2^{-2} \\ x\ \textless \ ( \frac{1}{2} )^2 \\ x\ \textless \ \frac{1}{4} [/latex] x∈(0; 1/4)   (4) Б - 4 В) [latex]log_{2}x\ \textgreater \ -2 \\ x\ \textgreater \ 0 \\ log_{2}x\ \textgreater \ log_{2}2^{-2} \\ x\ \textgreater \ 2^{-2} \\ x\ \textgreater \ \frac{1}{4} [/latex] x∈(1/4; +∞)    (3) В - 3 Г) [latex]log_{2}x\ \textless \ 2 \\ x\ \textgreater \ 0 \\ log_{2}x\ \textless \ log_{2}2^2 \\ x\ \textless \ 2^2 \\ x\ \textless \ 4[/latex] x∈(0; 4)    (2) Г - 2.