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Quantas palavras com 2 letras distintas podemos formar com as 7 primeiras letras do alfabeto
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Quantas palavras com 2 letras distintas podemos formar com as 7 primeiras letras do alfabeto

User Nasim
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No hablo mucho español, para...

solvar (solve) con 7*6.... porque son siete possible letras por la primera letra y solemente seis para LA segundo. La contesta es 42
User Stephenl
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