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tmua.fyi Mock Paper 2 (2) · Q8

Paper 2Logic & proofNumber & counting

Consider the claim: ‘for every positive integer nn, the value n2+n+1n^2+n+1 is odd.’ Which of the following is a counterexample?

An=2n=2
Bn=3n=3
Cn=5n=5
Dn=4n=4
Ethe statement is always true, so there is no counterexample

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