SOLUTION: For all integers n, n² – 3n +7 is odd.
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Question 911180: For all integers n, n² – 3n +7 is odd.
Answer by Fombitz(32388) (Show Source): You can put this solution on YOUR website!
Assume is even.
is even (even number of times adding an even number)
is even
So then,
even - even + odd = even + odd = odd
.
.
.
Assume is odd.
is odd (odd number of times adding an odd number)
is odd
odd - odd + odd = even + odd = odd
.
.
.
True.
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