Highlights of Calculus 05 指數函數 & 15 冪級數和歐拉方程

y = e x y=e^x y=ex key: d y d x = y \frac{dy}{dx}=y dxdy​=y To prove e x ∗ e X = e x + X e^x*e^X=e^{x+X} ex∗eX=ex+X: Geometric series

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