Question

The upper limit for the function f(x) = x3 - 3x 2 - 2x + 15 is
3
4
5

Answer 1

i think it would be 3 have a nice day

Answer 2

there is no upper limit. choosing x large enough one can get any positive number.
that is because x^3 grows much faster than x^2 and x.
the answer is: no upper limit (or infinity).