Proof by contraposition (Screencast 3.2.1)

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This video describes proof by contraposition, a method of proving a conditional statement by constructing a direct proof of its contrapositive.
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Комментарии
Автор

** := exponentiation
Is n**2 = 2, n = 2**0.5 not a counterexample to the proposition?
If not, then why?

matthewleader
Автор

what if it was n is even, then n2 is even?:)
if u could help me with this i would be so thankful and grateful:)

slam