anonymous
  • anonymous
Simplify the following unions and intersections of intervals.
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
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anonymous
  • anonymous
\[\eta \cup \mathbb{R}\]
anonymous
  • anonymous
The N stands for a set of all natural numbers.
anonymous
  • anonymous
The R stands for a set of all real numbers.

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More answers

anonymous
  • anonymous
what does \[\eta\] stand for?
anonymous
  • anonymous
oh maybe \[\mathbb N \cap \mathbb R\]
anonymous
  • anonymous
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.
anonymous
  • anonymous
\[\mathbb N \cap \mathbb R=\mathbb N\] since the natural numbers live inside the real numbers and \[\mathbb N \cup \mathbb R=\mathbb R\] for the same reason
anonymous
  • anonymous
\mathbb N
anonymous
  • anonymous
Oh thanks and sorry i am sorta new to this site so don't know exactly how to post stuff correctly.
anonymous
  • anonymous
I have 2 more problems like this one sec.
anonymous
  • anonymous
that is ok, easier just to describe the symbol pallet is only good for some things. i was showing off in latex
anonymous
  • anonymous
Oh what is latex? And how do i post and upside down unison like you did?
anonymous
  • anonymous
Hey satellite how do you post an upside down unison?
anonymous
  • anonymous
\cup
anonymous
  • anonymous
\cap
anonymous
  • anonymous
if you want to see any code, right click and it will show up. you can also copy and paste
anonymous
  • anonymous
\[A^c\cap B^c=(A\cup B)^c\]
anonymous
  • anonymous
Oh do i just click show format or what?\[\left[ 2,\infty)\cap(-4,7)\cap(-3,2 \right]\]
anonymous
  • anonymous
this is my next problem ^
anonymous
  • anonymous
so you are looking for what is in common to all three intervals. easy if you drew them
anonymous
  • anonymous
I think so yes...
anonymous
  • anonymous
|dw:1327692676456:dw|
anonymous
  • anonymous
the only number that \[[2,\infty)\] and \[(-3,2]\] have in common is 2
anonymous
  • anonymous
so that is the only number in the intersection
anonymous
  • anonymous
It says simplify the unions and intersections of intervals.
anonymous
  • anonymous
yes your answer is just one number: 2
anonymous
  • anonymous
Oh well that was simple so it is just what they have in common?
anonymous
  • anonymous
yeah intersection mean in both
anonymous
  • anonymous
\[(-4.8,-3.5)\cap \mathbb{Z}^+\]
anonymous
  • anonymous
this is last problem of these kind... don't mind + above Z it should just be Z
anonymous
  • anonymous
do you know what \[\mathbb Z^+\] is? (nice looking isn't it?)
anonymous
  • anonymous
ah that is different. \[\mathbb Z\] is all integers \[\{...,-3,-2,1,0,1,2,3,...\}\]
anonymous
  • anonymous
In my book it stands for set of all integers.
anonymous
  • anonymous
so you are looking for all integers in the interval you have. how many are there?
anonymous
  • anonymous
i think only one in there is -4
anonymous
  • anonymous
Only one integer correct.
anonymous
  • anonymous
then that is the only one in the intersection

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