moongazer
  • moongazer
What is the meaning of "or" , "and" in math?
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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moongazer
  • moongazer
and what do you call those?
UnkleRhaukus
  • UnkleRhaukus
a or b (inclusive)\[a\vee b\] a and b \[a\wedge b\]
UnkleRhaukus
  • UnkleRhaukus
|dw:1348403720368:dw|

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UnkleRhaukus
  • UnkleRhaukus
|dw:1348403767690:dw|
UnkleRhaukus
  • UnkleRhaukus
|dw:1348403820405:dw|
moongazer
  • moongazer
what do you call those "and" "or"
UnkleRhaukus
  • UnkleRhaukus
Conjunction \wedge \(\wedge\) Disjunction \vee \(\vee\)
moongazer
  • moongazer
thanks, can you help in finding a domain of a function?
UnkleRhaukus
  • UnkleRhaukus
Negation \neg \(\neg\) |dw:1348404218012:dw| \[\neg C\]
UnkleRhaukus
  • UnkleRhaukus
what is your function?
moongazer
  • moongazer
|dw:1348405394804:dw|
UnkleRhaukus
  • UnkleRhaukus
factorise the numerator and denominator
moongazer
  • moongazer
btw, "or" is like the union of the set and "and" is like the intersection of a set. Is that correct?
moongazer
  • moongazer
|dw:1348405630353:dw|
moongazer
  • moongazer
@UnkleRhaukus
UnkleRhaukus
  • UnkleRhaukus
"or" is like union "and" is like intersection kinda but they are used for slightly different things, i think the logic symbols are used for points, where as the set symbols are used for sets of points
UnkleRhaukus
  • UnkleRhaukus
what is the only number that dosent make sense in a denominator ? , what are two point values for x that would make your function undefined ?, exclude these from your domain
moongazer
  • moongazer
{x|x>2 and x>3 and x>=5 and x>=4} is this correct?
moongazer
  • moongazer
@UnkleRhaukus
UnkleRhaukus
  • UnkleRhaukus
i get \[\{x|((x≠2)\wedge (x≠3))\}\]
UnkleRhaukus
  • UnkleRhaukus
hmm im not right though
moongazer
  • moongazer
The answer in my notebook says: dom K: {x|x<2 or 3=5} I only copied that from my classmate because I was absent when my teacher discussed this. so I don't know how they got that
UnkleRhaukus
  • UnkleRhaukus
there is a strange discontinuity where 4
moongazer
  • moongazer
my notes also says that "use the number line to graph the values for which the function is defined.
moongazer
  • moongazer
that is for finding the domain.
moongazer
  • moongazer
@UnkleRhaukus
UnkleRhaukus
  • UnkleRhaukus
well x is defined from -∞ to 2 , at 2 this is a discontinuity, the from 2 to 4 defined, then discontinuity from 4 to 5 then defined again from 5 to ∞

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