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Mathematics, 18.01.2020 03:31 summerarellanoo

How many different documents are there which satisfy the condition that, for each wi in the vocabulary î£, the occurrence of the word wi in the document is exactly ti? that is, how many different word sequences are there which contain exactly tiwi âs for each wiin î£?

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How many different documents are there which satisfy the condition that, for each wi in the vocabula...
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