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Cu 1: V th cc hm s sau:
Cu 2: Xc nh tnh chn, l ca hm s sau. Nu hm s c tnh chn, l hy s dng tnh cht i xng v th:
Cu 3:
Cu 4:
Cu 5: V cc th ca hm s sau (s dng th ca hm s dng chun)
Cu 6:
Cu 7: