Find lim x infty h(x), if it exists. (If an answer does not exist, enter DNE.) f(x) = 6x ^ 3 - 5 ( a) h(x) = (f(x))/(x ^ 2); lim x -> ∞ h(x) = ( b) h(x) = (f(x))/(x ^ 3); lim x -> ∞ h(x) = ( c) h(x) = (f(x))/(x ^ 4); lim x -> ∞ h(x) =