Zadanie 1
f(x)=-\frac{4}{x}
A=(-1,a)
a=\frac{-4}{-1}=4
A=(-1,4)
-----------
B=(2^5,b)=(32,b)
b=\frac{-4}{32}=-\frac{1}{8}
B=(32,-\frac{1}{8})
------------
C=(c,-4^3)=(c,-64)
-64=\frac{-4}{c}
c=\frac{-4}{-64}
c=\frac{1}{16}
C=(\frac{1}{16},-64)
Zadanie 2
\frac{2}{2x-3}-\frac{2x}{x+4}
Dziedzina
2x-3\ne0 \Rightarrow 2x\ne 3 \Rightarrow x\ne\frac{3}{2}
i
x+4\ne 0 \Rightarrow x\ne -4
D = \mathbb R \backslash \{-4,\frac{3}{2}\}