大一微积分问题 设函数f(x)在区间I内二阶可导若曲线y=f(x)在区间I内凹,则曲线y=e^f(x)在I内也是凹的;若曲线y=f(x)在区间I内凸且在x轴上方,则曲线y=lnf(x)在I内也是凸的.原题叙述如此...总之希望
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![大一微积分问题 设函数f(x)在区间I内二阶可导若曲线y=f(x)在区间I内凹,则曲线y=e^f(x)在I内也是凹的;若曲线y=f(x)在区间I内凸且在x轴上方,则曲线y=lnf(x)在I内也是凸的.原题叙述如此...总之希望](/uploads/image/z/10749202-34-2.jpg?t=%E5%A4%A7%E4%B8%80%E5%BE%AE%E7%A7%AF%E5%88%86%E9%97%AE%E9%A2%98+%E8%AE%BE%E5%87%BD%E6%95%B0f%28x%29%E5%9C%A8%E5%8C%BA%E9%97%B4I%E5%86%85%E4%BA%8C%E9%98%B6%E5%8F%AF%E5%AF%BC%E8%8B%A5%E6%9B%B2%E7%BA%BFy%3Df%28x%29%E5%9C%A8%E5%8C%BA%E9%97%B4I%E5%86%85%E5%87%B9%2C%E5%88%99%E6%9B%B2%E7%BA%BFy%3De%5Ef%28x%29%E5%9C%A8I%E5%86%85%E4%B9%9F%E6%98%AF%E5%87%B9%E7%9A%84%EF%BC%9B%E8%8B%A5%E6%9B%B2%E7%BA%BFy%3Df%28x%29%E5%9C%A8%E5%8C%BA%E9%97%B4I%E5%86%85%E5%87%B8%E4%B8%94%E5%9C%A8x%E8%BD%B4%E4%B8%8A%E6%96%B9%2C%E5%88%99%E6%9B%B2%E7%BA%BFy%3Dlnf%28x%29%E5%9C%A8I%E5%86%85%E4%B9%9F%E6%98%AF%E5%87%B8%E7%9A%84.%E5%8E%9F%E9%A2%98%E5%8F%99%E8%BF%B0%E5%A6%82%E6%AD%A4...%E6%80%BB%E4%B9%8B%E5%B8%8C%E6%9C%9B)
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