Salazar Black
04/29/2023 · Elementary School
Find the intervals on which \( f(x) \) is increasing and the intervals on which \( f(x) \) is decreasing. Then sketch the graph. Add horizontal tangent lines. \( f(x)=x^{4}-72 x^{2} \) A. The function is increasing on \( \square \). (Type your answer using interval notation. Use a comma to separate answers as needed.) B. The function is never increasing.
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A. The function is increasing on \( (-6, 0) \) and \( (6, \infty) \).
B. The function is decreasing on \( (-\infty, -6) \) and \( (0, 6) \).
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