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