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Question

Let P(n) be the statement that n2−n+41 is prime, then which of the following is not true ?

A
P(2)
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B
P(3)
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C
P(41)
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D
none of these
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Solution

The correct option is C P(41)
given that P(n)=n2n+41
P(2)=222+41=43 (prime true)
P(3)=323+41=47 (prime true)
P(41)=41241+41=(41)2
P(41) is not true
Ans: C

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