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D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
y = (5*x)/x+2 // - (5*x)/x+2
y-((5*x)/x)-2 = 0
y-5-2 = 0
y-7 = 0
x naleu017Cy do R
x in (-oo:0) U (0:+oo)
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