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anonymous

  • 4 years ago

Simplify the following unions and intersections of intervals.

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  1. anonymous
    • 4 years ago
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    \[\eta \cup \mathbb{R}\]

  2. anonymous
    • 4 years ago
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    The N stands for a set of all natural numbers.

  3. anonymous
    • 4 years ago
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    The R stands for a set of all real numbers.

  4. anonymous
    • 4 years ago
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    what does \[\eta\] stand for?

  5. anonymous
    • 4 years ago
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    oh maybe \[\mathbb N \cap \mathbb R\]

  6. anonymous
    • 4 years ago
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    Yes it shows it like that except the U is facing up? And how did you post them like that i was looking for them.

  7. anonymous
    • 4 years ago
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    \[\mathbb N \cap \mathbb R=\mathbb N\] since the natural numbers live inside the real numbers and \[\mathbb N \cup \mathbb R=\mathbb R\] for the same reason

  8. anonymous
    • 4 years ago
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    \mathbb N

  9. anonymous
    • 4 years ago
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    Oh thanks and sorry i am sorta new to this site so don't know exactly how to post stuff correctly.

  10. anonymous
    • 4 years ago
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    I have 2 more problems like this one sec.

  11. anonymous
    • 4 years ago
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    that is ok, easier just to describe the symbol pallet is only good for some things. i was showing off in latex

  12. anonymous
    • 4 years ago
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    Oh what is latex? And how do i post and upside down unison like you did?

  13. anonymous
    • 4 years ago
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    Hey satellite how do you post an upside down unison?

  14. anonymous
    • 4 years ago
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    \cup

  15. anonymous
    • 4 years ago
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    \cap

  16. anonymous
    • 4 years ago
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    if you want to see any code, right click and it will show up. you can also copy and paste

  17. anonymous
    • 4 years ago
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    \[A^c\cap B^c=(A\cup B)^c\]

  18. anonymous
    • 4 years ago
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    Oh do i just click show format or what?\[\left[ 2,\infty)\cap(-4,7)\cap(-3,2 \right]\]

  19. anonymous
    • 4 years ago
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    this is my next problem ^

  20. anonymous
    • 4 years ago
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    so you are looking for what is in common to all three intervals. easy if you drew them

  21. anonymous
    • 4 years ago
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    I think so yes...

  22. anonymous
    • 4 years ago
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    |dw:1327692676456:dw|

  23. anonymous
    • 4 years ago
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    the only number that \[[2,\infty)\] and \[(-3,2]\] have in common is 2

  24. anonymous
    • 4 years ago
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    so that is the only number in the intersection

  25. anonymous
    • 4 years ago
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    It says simplify the unions and intersections of intervals.

  26. anonymous
    • 4 years ago
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    yes your answer is just one number: 2

  27. anonymous
    • 4 years ago
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    Oh well that was simple so it is just what they have in common?

  28. anonymous
    • 4 years ago
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    yeah intersection mean in both

  29. anonymous
    • 4 years ago
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    \[(-4.8,-3.5)\cap \mathbb{Z}^+\]

  30. anonymous
    • 4 years ago
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    this is last problem of these kind... don't mind + above Z it should just be Z

  31. anonymous
    • 4 years ago
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    do you know what \[\mathbb Z^+\] is? (nice looking isn't it?)

  32. anonymous
    • 4 years ago
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    ah that is different. \[\mathbb Z\] is all integers \[\{...,-3,-2,1,0,1,2,3,...\}\]

  33. anonymous
    • 4 years ago
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    In my book it stands for set of all integers.

  34. anonymous
    • 4 years ago
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    so you are looking for all integers in the interval you have. how many are there?

  35. anonymous
    • 4 years ago
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    i think only one in there is -4

  36. anonymous
    • 4 years ago
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    Only one integer correct.

  37. anonymous
    • 4 years ago
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    then that is the only one in the intersection

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