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How does a person feel when they are overdosed on 5 mg of 3 Melatonin pills? What kind of spider is this? I was in New Hampshire when I found it.? Can we add electrolyte to lead acid battery again? Why do mechanical engineers make fun of civil engineers? Find all real numbers a,b such that the polynomial f(x) = x^4+ax^3+(b/2)x^2 + 1 has at least one inflection point. use the discriminant > 0?