(3-2x)⁾*(x+5) - (3-2x)*(x+5)⁾ -2(x+5)- (3-2x)
f⁾(x) = ----------------------------------------- = -------------------------- =
(x+5)² (x+5)²
-2x-10-3+2x -13
= -------------------- = -----------
(x+5)² (x+5)²
-13
f⁾(-4) = --------------- =-13
(-4+5)²
-13
f⁾(x²-5)= ------------------ = -13/x⁴
(x²-5+5)²
f⁾(x)= (x+ 1/x)⁾ = 1 +1/x²
1 +1/x² ≥0
x²+1
---------- ≥ 0 ОДЗ х≠0
x²
х∈(-∞;0)∪(0;+∞)