# Answer to Question #17675 in Calculus for hsd

Question #17675

Let f(x)=x^2−3x−40. Find the open intervals on which f is concave up (down). Then determine the x-coordinates of all inflection points of f.

1. f is concave up on the intervals

2. f is concave down on the intervals

3. The inflection points occur at x =

1. f is concave up on the intervals

2. f is concave down on the intervals

3. The inflection points occur at x =

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