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12 questions from this quiz
Deducing true statements from known truths
Implies that
Because xxx could be ±3\pm 3±3
If and only if
P⇐QP \Leftarrow QP⇐Q
2n2n2n where nnn is an integer
2n+12n+12n+1 where nnn is an integer
The numbers may differ
2(n2+n)+12(n^2 + n) + 12(n2+n)+1
Sum of two even numbers is even
Proves product of two odds is odd
Right statement implies left
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