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1.f(x)=(x-3)x^
D=R
2.f(x)=3x/x-2
D=R\{2}
3.f(x)=5x^/(x-2)x
D=R\{0;2}
4.f(x)=7x/x^-64
D=R\{-8;8}
5.f(x)=pierwiastek 1-2x
1-2x≥0
2x≤1
x≤1/2
D=(-∞;1/2>
6.f(x)=1/ pierwiastek 1-2x
D=(-∞;1/2)
7.f(x)=log 1/2 (4x+5)
4x+5>0
4x>5
x>5/4
D=(5/4;+∞)
8.f(x)=7x-1/x^-4x+4
D=R\{2}
9.f(x)=x^-1/x^+1
D=R
10.f(x)=1/1-2x
1-2x≠0
1≠2x
x≠1/2
D=R\{1/2}
11.f(x)=x^+1/x^-1
D=R\{1;-1}