Explain how to solve the following problem: Find the limit as x approaches infinity of (f(x)-5x^(2))=\\pi. Evaluate the following limits:
(a) \\lim_(x->\\infty )(f(x))/(x^(2)),
(b) \\lim_(x->\\infty )(f(x))/(x),
(c) \\lim_(x->\\infty )(f(x))/(x), and
(d) \\lim_(x->\\infty )(f(x))/(x).