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

(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
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