2 / ___\ \1 - \/ x /
(1 - sqrt(x))^2 при x = 1/4
(1 - sqrt(x))^2
(1 - sqrt((1/4)))^2
(1 - sqrt(1/4))^2
1/4
(1.0 - x^0.5)^2
2 / ___\ \-1 + \/ x /
___ 1 + x - 2*\/ x