1 11. Determine the open intervals where the graph of f (x) = - i...

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1 11. Determine the open intervals where the graph of f (x) = - is concave up or concave down. (x+1)² (A) Concave down on (-00,00) (B) Concave down on (-00,-1); concave up on (-1,00) (C) Concave down on (-00,-1) and (-1,00) (D) Concave up on (-00,-1) and (-1,00) (E) None of these x 12. Find all open intervals on which f (x) = x²+x-2 is decreasing. (A) (-00,2)u(-2,1) U (1,00) (B) (-00,00) (C) (-co,0) (D) (-00,-2) u (1,00) (E) None of these

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