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5-26.

f '(2) = 0 means that there COULD be a local maximum or local minimum at x = 2.
f ''(2) < 0 means that f(x) is concave down at x = 2, confirming that x = 2 is a local ________________________.

If slope is positive on the left side of a point and negative on the right side, the that point is the location of a local ___________________.