Răspuns:
Roaga pe cineva sa verifice. Nu stiu daca am gandit bine.
Explicație pas cu pas:
F(x)=x+3
f(2)= 2+3=5
f(2)+ f(2^3)+ ......f(2^6)=
f(2)+ f(2^3)+ f(2^4)+ f(2^5)+ f(2^6)=
F(2^4)= f(2^3) orif(2)
F(2^5)= f(2^2)ori f(2^2)
F(2^6)= f(2^3)ori f(2^3)
Deci
5+ f(2^3) ori ( 1+ f(2)+ f(2^2)+ f(2^3))=
F(2^3)= 11
F(2)= 5
F(2^2)= 7
5+ 11 ori ( 1+5+7+11)=
= 5+11 ori (13+11)=
= 5+ 11 ori 24=
= 5+264=269
13^2=269
