Question

find the upper and lower bounds of f(x)=(x-2)(8-x) on 2 14 years ago

Answer 1

this is a parabola that faces down, with vertex at x = 5

Answer 2

so the upper bound will be whatever
\[f(5)\] is.
as for the lower bound, check which is smaller,
\[f(2)\] or
\[f(8)\]
pretty much by inspection they are both zero, so that is the lowest bound

Answer 3

thnaks