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x in (-oo:+oo)
p-((4*p)/2)+1 = 3-((4*n)/n) // - 3-((4*n)/n)
p-((4*p)/2)+(4*n)/n-3+1 = 0
p-2*p+(4*n)/n-3+1 = 0
2-p = 0
x naleu017Cy do R
x in (-oo:+oo)
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