What would be the nicest proof of the following theorem:
If limn→∞an=∞, then limn→∞(1+1an)an=e.
If limn→∞bn=0, then limn→∞(1+bn)1bn=e.
I somehow failed to find a proof here on the website and in the literature.
Answer
Hint:
(1+1⌊an⌋+1)⌊an⌋⩽(1+1an)an⩽(1+1⌊an⌋)⌊an⌋+1,
and
(1+1n+1)n,(1+1n)n+1→e
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