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Typo at chapter 0(prerequisites) page 12

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Typo at chapter 0(prerequisites) page 12

GeorgeM
It says that the set of AUB = [-5,+infinity) although the graph above shows that 1 and 3 are not a part
of A or B.
So the answer should be AUB = [-5,1)U(1,3)U(3,+infinity)
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Re: Typo at chapter 0(prerequisites) page 12

Carl Stitz
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Hello,

"1" is part of A and "3" is part of B (since there is no "open circle" in those sets at those points) so that means 1 and 3 are part of AUB.

Hope that helps!

Thanks for checking,

Carl
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