[tex]nlog_{5}2 + nlog_512,5 + log10 = nlog_5(2\cdot12,5)+1 = nlog_525+1 = nlog_55^{2}+1=\\\\=n\cdot2 + 1 =2n+1 \ - \ nieparzysta \ dla \ kazdego \ n \in N[/tex]
