Question: Consider the function f(x)=-2x3-21x2-20. Differentiate f and use the derivative to determine each of the following.All intervals on which f is increasing. If there are

Consider the function f(x)=-2x3-21x2-20. Differentiate f and use the derivative to determine each of the following.All intervals on which f is increasing. If there are more than one intervals, separate them by a comma. Use open intervals and exact values.f increases on: All intervals on which f is decreasing. If there are more than one intervals, separate them by a comma. Use open intervals and exact values.f decreases on: The value(s) of x at which f has a relative maximum. If there are more than one solutions, separate them by a comma. Use exact values.f has relative maximum(s) at x=The value(s) of x at which f has a relative minimum. If there are more than one solutions, separate them by a comma. Use exact values.Thas relative minimumis) at x=

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