P nanoq polymonuutaalik, P(0) = k, P(1) = 2k, P(-1) = 3k. P(2) + P(-2) ?
Ilisarnaatiga P(x) ullumi inergeqarnera:

    P(x) = ax^3 + bx^2 + cx + k

Takuuk, P(0) = k, P(1) = 2k, P(-1) = 3k. 

P(1) = 2k-mut tunisssat, peqatit:

    a + b + c + k = 2k

P(-1) = 3k-mut tunisssat, peqatit:

    -a + b - c + k = 3k
    
Ilimarneqarnerup kingorna, peqatit:

    2b + 2k = 5k
    
2b = 3k, b = 3/2 k

P(2) + P(-2) imaasoq:

    P(2) + P(-2) = (8a + 4b + 2c + k) + (-8a + 4b - 2c + k)
                 = 8b + 2k
                 = 12k + 2k
                 = 14k
    
P(2) + P(-2) = 14k