2, 2, 2, X, ....

F(n) is a polynomial function of the form an^3 + bn^2 + cn + d

F(1) = 2
F(2) = 2
F(3) = 2
f(4) = X

X is larger than 3

Also, 2 terms out of a, b, c and d above are equal

What's the exact value of F(8)?

If you meant tht F(4) = X then F(8) is 62 if i haven't made any miscalculations.

Nice one master#37!