Ответы и объяснения

2013-10-16T10:27:17+04:00
(dx(y))/(dy) = 1/(2+2 x)
(dy(x))/(dx) = 2 (1+x)
(d^2 x(y))/(dy^2) = -1/(4 (1+x) (-3+y))
(d^2 y(x))/(dx^2) = 2