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math

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find n(A)for each set

A={1/2, -1/2, 1/3, -1/3,..., 1/10, -1/10}

  • math - eh? - ,

    what is n(a set)?

  • math - ,

    looks like the fractions from 1/2 , 1/3 . ... 1/10 come in pairs with their negatives,
    I count 18 of them

  • math - ,

    n(A) is the cardinal of the sets and how did you get the #18

  • math - ,

    o ok i got it 1/2 1/3 1/4 1/5 1/6 1/7 1/8 1/9 1/10 thanks

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