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Answer by Mohammad Riazi-Kermani for positive (negative) intervals for...
You are correct in disregarding the complex roots in determining the sign of your function. It suffices to only consider the real roots and check the intervals between them for the sign of the...
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I have a question, which could be high-school level, sorry about that in advance, but could not find a source on the net. Here is my question:Suppose that we have fifth order polynomials with one real...
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