Răspuns:
4
Explicație:
f(6) = g(6+f(5))
f(5) = g(5+f(4))
f(4) = g(4+f(3))
f(3) = g(3+f(2))
f(2) = g(2+f(1))
f(1) = g(1+f(0))
f(0) = 1 --> f(1) = g(1+1) = g(2)
g(2) = 2 --> f(1) = 2
f(2) = g(2+2) = g(4) = 4
f(3) = g(3+4) = g(7) = 7
f(4) = g(4+7) = g(11) = 2
f(5) = g(5+2) = g(7) = 7
f(6) = g(6+7) = g(13) = 4