3-t Let F(1) = | dt for -00 < I<+00 t2 + 16 (a) Find the value of z where F obtains its maximum value. T= 3 (b) Find the intervals over which F is only increasing or decreasing. Use interval notation using U for union and enter "none" if n Intervals where Fis increasing: (-0,3) Intervals where Fis decreasing: (3,00) (c) Find open intervals over which Fis only concave up or concave down. Use interval notation using U for union and enter "non Intervals where Fis concave up: (-x,-2)U(8,c) Intervals where Fis concave down: (-2,8)

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