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Mathematics 10 Online
OpenStudy (anonymous):

What is the solution set of {x | x < -3} ∩ {x | x > 5}? all numbers except -3 and 5 the numbers between -3 and 5 the empty set all real numbers

OpenStudy (anonymous):

@math&ing001

hartnn (hartnn):

can you think of numbers less than -3 ?

OpenStudy (anonymous):

-4 i meant

OpenStudy (anonymous):

-5 -6 -7

OpenStudy (anonymous):

right?

hartnn (hartnn):

yeah, set {-4,-5,-6,....} what about x> 5 yes right :)

OpenStudy (anonymous):

so is that smaller than 5 or greater

hartnn (hartnn):

i mean, think of numbers greater than 5 ?

OpenStudy (anonymous):

6, 7, 8, 9

hartnn (hartnn):

yes, do you see any numbers in common ?

hartnn (hartnn):

∩ means common part

OpenStudy (anonymous):

well 6 and -6 are opposites

hartnn (hartnn):

but not same

hartnn (hartnn):

so any number common ?

OpenStudy (anonymous):

no so is it empty set

hartnn (hartnn):

yes! correct :)

OpenStudy (anonymous):

@hartnn i got more lol its like extra credit i will link you ok

hartnn (hartnn):

sure , no problem :)

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