How many real roots?
Question How many real roots does the following equation have: x^5 + 7*x^3 + 3*x + 2 = 0. a)0 b)1 c)3 d)5 How to solve this kind of question ? solution in my book : f(x) = x^5 + 7*x^3 + 3*x + 2 First derivative of f(x) is 5x^4 + 21x^2 +...
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