英语翻译A certain communication system is made up of 40 symbols.
英语翻译
A certain communication system is made up of 40 symbols.A maximum of two symbols placed together,order not mattering,make up a word.What is the maximum number of words in this communication system?
A certain communication system is made up of 40 symbols.A maximum of two symbols placed together,order not mattering,make up a word.What is the maximum number of words in this communication system?
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