Răspuns :
[tex]\it a)\ 2^x+2^y=129=128+1=2^7+2^o \Rightarrow x=7,\ \ y=0\\ \\ c)\ \ 2^x+3^y=82=1+81=2^0+3^4 \Rightarrow x=0,\ \ y=4[/tex]
[tex]\it a)\ 2^x+2^y=129=128+1=2^7+2^o \Rightarrow x=7,\ \ y=0\\ \\ c)\ \ 2^x+3^y=82=1+81=2^0+3^4 \Rightarrow x=0,\ \ y=4[/tex]