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D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
y = (3*x)/x+5 // - (3*x)/x+5
y-((3*x)/x)-5 = 0
y-5-3 = 0
y-8 = 0
x naleu017Cy do R
x in (-oo:0) U (0:+oo)
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