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已知 成等比数列,且 a 1 + a 2 + a 3 + a 4 = ln ( a 1 + a 2 + a 3 ) .若 ,则( )
a 1 < a 3 , a 2 < a 4
a 1 > a 3 , a 2 < a 4
a 1 < a 3 , a 2 > a 4
a 1 > a 3 , a 2 > a 4
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