Posted by **Ting** on Monday, March 19, 2012 at 3:04pm.

Let f (x) =7x-5/x+3

. Find the open intervals

on which f is concave up (down). Then determine the xcoordinates

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 =

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