f(x) = x- 50x² + 4 (a) Find the interval on which f is increasing. (Enter your answer using interval notation.) Find the interval on which f is decreasing. (Enter your answer using interval notation.) (b) Find the local maximum and minimum values of f. local minimum value local maximum value (c) Find the inflection points. (Order your answers from smallest to largest x, then from smallest to largest y.) (х, у) %3D (х, у) %3D Find the interval on which fis concave up. (Enter your answer using interval notation.) Find the interval on whichf is concave down.(Enter your answer using interval notation.)

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