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jonathanldong
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jonathanldong
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What is the units digit of the sum of the nine terms of the sequence 1! + 1, 2! + 2, 3! + 3, ..., 8! + 8, 9! + 9?
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jonathanldong
Aug 7, 2023
+1
71
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what is e?
many people tell me about imaginary numbers, such as i and e, but I do not know what e means. Sombody pls answer.
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jonathanldong
Aug 5, 2023
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