-4-3 £2 -1 a. On what interval(s) of x is f(x) positive (f(x) > 0)? | b. On what interval(s) of x is f(x) negative (ƒ(x) < 0)?' c. On what interval(s) of x is f(x) increasing? d. On what interval(s) of x is f(x) decreasing? e. On what interval(s) of x is f concave up? f. On what interval(s) of a does f concave down? 4 y 3 2 1 -1 -2 15 -4 2 31 4 combine intervals, you can enter "U" for union. If no interval exists, enter "DNE". All intervals below should be open intervals (DO NOT lude end points). ↑ Preview no answer given Enter an interval using interval notation [more.. Preview Preview Preview Preview Preview

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