Question

(本小題滿分16分，每小題8分)
解下列不等式：
(1) ；                              (2) log₇3x < log₇(x²-4)．

Answer 1

（1）
（2） x>4

(1) 解：3x+1≥ x-2，·················································································· 5分
．············································································ 8分
(2) 解：·················································································· 4分
分別得：x > 0；x <-2或x> 2；x <-1或x > 4，································ 6分
解得：x > 4．·········································································· 8分