8 ______ / 2 \/ 5*a ---------- 1 / 8\ \a /
(sqrt(5*a^2))^8/(a^8)^1 при a = 1/2
(sqrt(5*a^2))^8/(a^8)^1
(sqrt(5*(1/2)^2))^8/((1/2)^8)^1
625
625.0*(a^2)^4.0/a^8
8 625*a ------ 8 a