Resposta :
P(2) = 2.2³=k.2³+3.2-2k
P(2) = 2.8=8k+6-2k
P(2) = 16 = 8k-2k+6
--> 16-6 = 6k
6k = 10
k = 10/6
k = 5/3
P(2) = 2.8=8k+6-2k
P(2) = 16 = 8k-2k+6
--> 16-6 = 6k
6k = 10
k = 10/6
k = 5/3