Answer
(a) $x=3$ (multiplicity 1) .
(b) crosses the x-axis at $x=3$.
(c) $6$.
(d) $y=2x^7$.
Work Step by Step
(a) Given $f(x)=2(x-3)(x^2+4)^3$, we can find zero(s) $x=3$ (multiplicity 1) .
(b) The graph crosses the x-axis at $x=3$.
(c) The maximum number of turning points on the graph is $n-1=7-1=6$.
(d) The end behavior is similar to those of $y=2x^7$.
