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