2. C). -1 < M ≦ 12. D). 12 < M ≦ 1
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. C). -1 < m ≦1
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. D).1
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< m ≦ 1Bạn đang xem 2 . - BAI TAP TRAC NGHIEM PHUONG TRINH LUONG GIAC (1)
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. C). -1 < m ≦1
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. D).1
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< m ≦ 1