本文将证明:若整数a≥2,且a≠5,方程(a-1)x^2+(91a+9)=4a^n无满足2|n的正整数解(x,n); 若a=5,则此方程满足2|n的正整数解(x,n)=(3,3).
In this paper, we prove that if a ≥ 2 is an integer and a ≠5, the equations (a-1)x^2+(91a+9)=4a^nhave no positive integer solutions (x, n) with 2 |n; if a = 5, the equation has the only solution (x, n) = (3, 3) with 2 |n.