[tex] \frac{ 5^{x} +1}{26}\ \textless \ 1
[/tex]
[tex]{ 5^{x} +1}\ \textless \ 26[/tex]
[tex]5^{x} \ \textless \ 26-1[/tex]
[tex]5^{x} \ \textless \ 25=\ \textgreater \ 5^{x}\ \textless \ 5^{2} =\ \textgreater \ x\ \textless \ 2[/tex]
[tex] \frac{17}{4}^{x} +1\ \textless \ 1[/tex]
[tex]17\ \textless \ 4^{x} +1=\ \textgreater \ 16\ \textless \ 4^{x} =\ \textgreater \ 4^{2} \ \textless \ 4^{x}=\ \textgreater \ x\ \textgreater \ 2[/tex]
=> solutia nu este una comuna
