F X 1 X 2 Concave Up Concave Down

f(x) = 1/x+2

Concave up?

Concave down?

Any help would be appreciated! 

12x1f x 2x2f x 3xf x 0f x Concave up: 0, Concave down: , 0 No inflection points 1x21f x 2 x 2 If f x f x 2 x 2Concave up: 2, Concave down: , 2 3 No inflection points