计算:8除以1.6的四分之三次方.若f(x)=(ax+2)/(x+2)在(-2,正无穷大)上单调递增,求a.若f(x)对任意x,y,有f(x+y)=f(x)+f(y),且f(x)不恒为0,则f(x)是奇函数还是偶函数?以上三道是这周作业(北京四中)的三道题,
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