设a为实数,函数f(x)=ex-2x+2a,x∈R. (1)求f(x)的单调区间与极值; 知f′(x)=ex-2,x∈R. 令f′(x)=0,得x=ln2,我不会算ex的值.想问是怎么算出的x=In2的?
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![设a为实数,函数f(x)=ex-2x+2a,x∈R. (1)求f(x)的单调区间与极值; 知f′(x)=ex-2,x∈R. 令f′(x)=0,得x=ln2,我不会算ex的值.想问是怎么算出的x=In2的?](/uploads/image/z/5192793-9-3.jpg?t=%E8%AE%BEa%E4%B8%BA%E5%AE%9E%E6%95%B0%2C%E5%87%BD%E6%95%B0f%28x%29%EF%BC%9Dex%EF%BC%8D2x%EF%BC%8B2a%2Cx%E2%88%88R%EF%BC%8E+%281%29%E6%B1%82f%28x%29%E7%9A%84%E5%8D%95%E8%B0%83%E5%8C%BA%E9%97%B4%E4%B8%8E%E6%9E%81%E5%80%BC%EF%BC%9B+%26%238203%3B%E7%9F%A5f%E2%80%B2%28x%29%EF%BC%9Dex%EF%BC%8D2%2Cx%E2%88%88R%EF%BC%8E%E3%80%80%E3%80%80%E4%BB%A4f%E2%80%B2%28x%29%EF%BC%9D0%2C%E5%BE%97x%EF%BC%9Dln2%2C%E6%88%91%E4%B8%8D%E4%BC%9A%E7%AE%97ex%E7%9A%84%E5%80%BC.%E6%83%B3%E9%97%AE%E6%98%AF%E6%80%8E%E4%B9%88%E7%AE%97%E5%87%BA%E7%9A%84x%3DIn2%E7%9A%84%3F)
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