anonymous
  • anonymous
Interval notation of domain:at most -6
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
@mathmate
mathmate
  • mathmate
|dw:1440459096813:dw| Does that help?
anonymous
  • anonymous
Kinda but I still don't really know how to write it??

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anonymous
  • anonymous
Like for the set notation I got x/x>=-6
anonymous
  • anonymous
Ok let's move onto a different on then?
mathmate
  • mathmate
Interval notation basically gives the lower and upper bounds. For example, for a range of real numbers between 4 and 6, inclusive, we write [4,6]. If it is exclusive, we use ( or ) instead, for example, for x>3, then we write x\(\in\) (3,\(\infty\)), because both 3 and infinity are not included. (Infinity is not a real number).
anonymous
  • anonymous
ok so what would the answer be in this problem? (\[\infty,6\]
mathmate
  • mathmate
Yes, but you need the appropriate brackets around the two numbers (separated by a comma, as you correctly did).
mathmate
  • mathmate
The interval excludes -\(\infty\) but includes -6. Can you find the appropriate brackets?
anonymous
  • anonymous
I can't fine them in the equation box?
anonymous
  • anonymous
|dw:1440459864333:dw|
mathmate
  • mathmate
The left one should be a (, because -\(\infty\) is not a number, so must be excluded.
anonymous
  • anonymous
Thanks! I dont understand this last one: 4x-8>-12 and 5x-1<=9 in set notation
mathmate
  • mathmate
Have you solved for x yet?
anonymous
  • anonymous
yes x>-1 and 2<=x
mathmate
  • mathmate
Good! Can you show that on a number line? In interval notation, it would be (-1,2]
anonymous
  • anonymous
|dw:1440460335843:dw|
mathmate
  • mathmate
Good! For the previous problem in set notation, it would be \(\{x\in R | -\infty
anonymous
  • anonymous
Thank-you :D!!
anonymous
  • anonymous
What about the 2nd one?
mathmate
  • mathmate
Try it out like the first one, and I can help you correct it if necessary.
anonymous
  • anonymous
I got hold on..
anonymous
  • anonymous
|dw:1440460869976:dw|
mathmate
  • mathmate
Almost, \(\{x\in R~ | -1
anonymous
  • anonymous
ohh! Sorry :)
mathmate
  • mathmate
Don't worry about it. What's important is that you understand what's being done. Reading the article will make it more clear.
anonymous
  • anonymous
I do. More or less. I dont get interval notation though?
anonymous
  • anonymous
like 3x-5>17x-1 ??
mathmate
  • mathmate
The article talks about interval notation as well, so you get two birds with one stone! lol
anonymous
  • anonymous
Cool!! Thanks so much for all your help:))
mathmate
  • mathmate
You're welcome! :)

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