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anonymous

  • one year ago

Let A={14,15,16,17,18,19} a. How many subsets does A have? b. How many proper subsets does A have?

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  1. anonymous
    • one year ago
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    It can be shown that, for a set with n elements, there are 2^n subsets. For proper subsets, subtract 1 from 2^n

  2. anonymous
    • one year ago
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    hold on what? Wouldn't there be 6 elements... and...

  3. anonymous
    • one year ago
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    I'm drawing blanks here...

  4. anonymous
    • one year ago
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    yes there are 6 elements, and thus there are 2^6 subsets

  5. anonymous
    • one year ago
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    so 6 subsets and 2 proper subsets?

  6. anonymous
    • one year ago
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    2^6 does not equal 6

  7. anonymous
    • one year ago
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    |dw:1439938896653:dw|

  8. anonymous
    • one year ago
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    64

  9. anonymous
    • one year ago
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    right :)

  10. anonymous
    • one year ago
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    the number of proper subsets is 1 less than the number of subsets

  11. anonymous
    • one year ago
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    64-1?

  12. anonymous
    • one year ago
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    yes

  13. anonymous
    • one year ago
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    Let A={14,15,16,17,18,19} a. How many subsets does A have? =6 b. How many proper subsets does A have? =63

  14. anonymous
    • one year ago
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    a. is not correct

  15. anonymous
    • one year ago
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    a.=64

  16. anonymous
    • one year ago
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    thats correct now

  17. anonymous
    • one year ago
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    ahh!! something so easy, thank you, i cant do math to save my life lol

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