Calcule o valor dos seguintes limites:
(a) lim x infty[x^4-3 x+2]
(b) lim x infty(raizx+1-raizx)
© lim x infty xraizx+1
(d) lim u 1 1u^2-3 u+2
(e) lim x infty x^3-2 x^2x^2-4 x+4
(f) lim x 1 raiz[3]x+7-2x-1.

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