3 ms·Because |n^2|≤|n^3| as n→∞, so if |f| ≤ A|n^2| as n→∞, then |f| ≤ A|n^3| as n→∞.by ndriscoll 1y agoBecause |n^2|≤|n^3| as n→∞, so if |f| ≤ A|n^2| as n→∞, then |f| ≤ A|n^3| as n→∞.