musze okreslic dziedzine funkcji f(x)=2/-3x+1
pilnee. !!
-3x+1≠0
-3x≠-1
3x≠1
x≠1/3
D=R\{1/3}
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-3x+1≠0
-3x≠-1
3x≠1
x≠1/3
D=R\{1/3}