(2 - х) / 2(х - 2) =
= -(х - 2) / 2(х - 2) =
= -1 / (х - 2),
при х = 12:
-1 / (12 - 2) = -1 / 10 = -1/10 (или -0,1)
(2 - х) / 2(х - 2) =
= -(х - 2) / 2(х - 2) =
= -1 / (х - 2),
при х = 12:
-1 / (12 - 2) = -1 / 10 = -1/10 (или -0,1)