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D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
Y = 4-((3*x)/x)-5 // - 4-((3*x)/x)-5
Y+(3*x)/x-4+5 = 0
Y+4 = 0
x należy do R
x in (-oo:0) U (0:+oo)
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