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#779ff866-3260-428f-81ff-3facb43252b8简单填空题排列与组合概率与统计

15.下列关于函数f(x)=loga(x22ax+a2l)(a>0f(x)=\log _{a}(x^{2}-2ax+a^{2}-l)(a>0,且a1)a\ne 1)说法正确的是((  ))