[tex]2^{2006}\ \textless \ 2x-2\ \textless \ 2^{2007}|:2\\
2^{2005}\ \textless \ x-1\ \textless \ 2^{2006}|+1\\
2^{2005}+1\ \textless \ x\ \textless \ 2^{2006}+1\\
x\in\{2^{2005}+2;2^{2005}+3;...;2^{2005}+2^{2005}=2^{2006}\}\\
Multimea\ A \ va \ avea\ cardinalul\ 2^{2005}-1.[/tex]