(1)已知s(n),则s(n-1) = 1/4a(n-1)^2 + 1/2a(n-1) + 1/4
a(n) = s(n) - s(n-1) = 1/4[a(n)^2 - a(n-1)^2] + 1/2[a(n) - a(n-1)],整理,得
2[a(n) + a(n-1)] = [a(n) - a(n-1)] * [a(n) + a(n-1)],由...
(1)已知s(n),则s(n-1) = 1/4a(n-1)^2 + 1/2a(n-1) + 1/4
a(n) = s(n) - s(n-1) = 1/4[a(n)^2 - a(n-1)^2] + 1/2[a(n) - a(n-1)],整理,得
2[a(n) + a(n-1)] = [a(n) - a(n-1)] * [a(n) + a(n-1)],由...