Răspuns:
373
Explicație pas cu pas:
f(x)=x+2
f(3)+f(3²)+f(3³)+f(3⁴)+f(3⁵)=f(3)+f(9)+f(27)+f(81)+f(243)=(3+2)+(9+2)+(27+2)+(81+2)+(243+2)=5+11+29+83+245=250+40+83=250+123=373.
f(3)=3+2=5
f(9)=9+2=11
f(27)=27+2=29
f(81)=81+2=83
f(243)=243+2=245
5+11+29+83+245=373
