[數論] 兩題二次剩餘
數論剛開始學二次剩餘
真的是不太懂ˊˋ
只會寫基本簡單的習題,難一點的就不會了
1) X^2 ≡ 23 (mod77)
請問該怎麼解呢?
2) prove that the (p-1)/2 quadratic residues mod p are congruent
to 1^2, 2^2, 3^2,.....(p-1/2)^2 mod p
這題題目看了兩遍都看不懂
有請高手解答,謝謝>.<
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