kak tolong dong jawab

51) (x - 1)/(x + 1) < 1
(x - 1)/(x + 1) - 1 < 0
(x - 1 - (x + 1))/(x + 1) < 0
-2/(x + 1) < 0
(x + 1) > 0
x > -1

52) f(-x) = -f(x)
f(3) = -5 => f(-3) = 5
f(-5) = 1 => f(5) = -1
f(f(-3)) = f(5) = -1