(a) Suppose that f is a polynomial of degree 3 or more. Explain,
in your own words, how you would
use real zeros of f to determine the open intervals over which
f(x) > 0 or f(x) < 0. Be brief
and precise. In particular, you need to tell how and where the
sign of f changes.
(d) Rewrite the expression (cos x)2x in terms of natural base
e.
4. Let f(x) = x2 + 5. Find limh-0 f(3+h) -...