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OpenStudy (anonymous):
n^2+n+7 is prime
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OpenStudy (anonymous):
what is the question?
OpenStudy (anonymous):
which of the following is a counterexample for the given statement
OpenStudy (anonymous):
well you can just plug in numbers lets try 1 1^2 +1+7 = prime? 1+1+7=9 but 9 is not prime since 3*3 = 9
OpenStudy (anonymous):
the answers i have are n = 1 2 3 and 5
OpenStudy (anonymous):
well then n=1
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OpenStudy (anonymous):
thank u
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