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周国镇老师在为《初等微积分精讲》所作序中,明确指出:在高中阶段,微积分应该学,而且能学好,今就微积分中的“零值定理”,给出两个
Zhou Guozhen’s teacher in the preface to the “Preliminary Calculus Essentials” clearly pointed out that: In the high school stage, calculus should be studied, and can be learned well. Nowadays, the “zero value theorem” in calculus gives two