Question: Determine the open intervals on which the graph is concave upward or concave downward. 1. f(x)= 24/x^2+12 2. f(x)= x^2+1/x^2-1 3. g(x)= x^2+4/4-x^2

Determine the open intervals on which the graph is concave upward or concave downward.

1. f(x)= 24/x^2+12

2. f(x)= x^2+1/x^2-1

3. g(x)= x^2+4/4-x^2

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