PART 15:例題-二階導數判別法. 求f(x) = - {x^4} + 2{x^2} + 1 之相對極值(採用二階導數判別法). SOL: f'(x) = - 4{x^3} + 4x = - 4x({x^2} - 1) = - 4x(x - 1)(x + ...
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