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Unformatted text preview: proving existence
To prove the a set is nonempty, it's enough to exhibit one element. How do you prove: W PR
x ;x 3 + 3x2 4x = 12 slide 2 prove a claim about a sequence
Dene sequence an by: Now prove: V PN
n an = n2
i W PN V PN
i ; j ; aj A j < i slide 3 scratch slide 5 scratch slide 12 ...
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 Fall '10
 DannyHeap
 Computer Science, PN V PN

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