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x ⇒ 2
2(2) + 3
4 + 3 = 7
b) Lím (x² - 4x + 1) = - 3
x ⇒ 2
(2² - 4(2) + 1)
(4 - 8 + 1)
(5 - 8) = - 3
c) Lím x - 2 3 - 2 1
x ⇒ 3 --------- = --------- = -------
x + 2 3 + 2 5