If x = c is a critical value for f(a), where is a real number, and f " (c) > 0, what does this mean for the Second Derivative Test?
O f(x) is concave down
O f(x) has a local maximum at x = c.
O Second Derivative Test fails.
O f(x) is concave up. f(x) has a local minimum at 2 = c.
O f(x) does not have a local maximum or local minimum at x = c.