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March 2, 2015

March 2, 2015

Posted by **Mishaka** on Saturday, November 19, 2011 at 4:29pm.

List ALL intervals on which the functon f(x) is concave up and ALL intervals on which the function f(x) is concave down.

- Calculus -
**Mishaka**, Saturday, November 19, 2011 at 6:25pmNevermind, I figured it out. Since the function is odd it must be symmetric about the origin, so:

concave up: -5 < x < -3 and 0 < x < 3 and x > 5

concave down: x < -5 and -3 < x < 0 and 3 < x < 5

- Calculus -
**Steve**, Saturday, November 19, 2011 at 6:29pmWe don't really know anything about f(x) for x>5, but let's assume it stays concave down.

Since f is odd, it is radially symmetric about the origin.

So, f is concave down on -3 < x < 0

and f is concave up on -5 < x < -3

We will assume it stays concave up for x < -5.

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