ThmDex – An index of mathematical definitions, results, and conjectures.
Approximating sequence for the natural exponential function
Formulation 0
Let $\lambda, a_0, b_0, a_1, b_1, a_2, b_2, \dots \in \mathbb{R}$ each be a D993: Real number such that
(i) \begin{equation} \lim_{n \to \infty} a_n = 0 \end{equation}
(ii) \begin{equation} \lim_{n \to \infty} b_n = \infty \end{equation}
(iii) \begin{equation} \lim_{n \to \infty} a_n b_n = \lambda \end{equation}
Then \begin{equation} \lim_{n \to \infty} (1 + a_n)^{b_n} = e^{\lambda} \end{equation}