A:I am lost.
B:This way, please.
— I can't decide at present. ________.
已知函数f(x)=logax2-ax+3(a>0且a≠1)满足下述条件:对任意实数x1,x2,当x1<x2≤a2时,总有f(x1)-f(x2)>0,则实数a的取值范围是( )