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The function 1/x^2+1 is concave down on which interval? a.-0.5 < x < 0.5 b.0 < x < 1 c.x < -0.5 d.x > 0.5

The function 1/x^2+1 is concave down on which interval? a.-0.5 < x < 0.5

b.0 < x < 1

c.x < -0.5

d.x > 0.5

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