Ch.4 24. c
I'm kind of unclear as to what this question is asking…
I'm kind of unclear as to what this question is asking…
They want you to show that for any prime modulus p at least 7, there exist two numbers a and b so that
(1)
and so that both a and b are squares modulo p.
Does that help?
It wants you to prove that there are at least two consecutive quadratic residues mod p. That is, show that there is at least a pair n, n+1 that are quadratic residues mod p. And using part (a) is a big hint. Think about which numbers we know already are quadratic residues mod p and then see how you can use that and part (a) together. Hope that helps!