4- to --6 -5 -4 -3 -2 -1 5- ver which interval of z values is f'> 0? о (2, о) O 12, 0) 0(- 00, 2) 0(- 0, 2] 0(- 00, 00) ver which interval of z values is f' < 0? о (2, о) O 12, 00) 0(- 00, 2) 0(- 0, 2| 0(- 0, 0)

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