The graph of a function f is shown below. 2 -4 4 -2 -4 For the following questions, note that you can enter "U" for U to combine intervals, and enter "DNE" if there is no appropriate interval exists. a. On what interval(s) of x is f(æ) positive? Preview b. On what interval(s) of æ is f (x) negative? Preview c. On what interval(s) of æ is f(x) increasing? Preview

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