已知实数x,y满足条件xy≤64,x≥2,y≥2,则z=log2 (x)+ log2(y)的最小值是

已知实数x,y满足条件xy≤64,x≥2,y≥2,则z=log2 (x)+ log2(y)的最小值是
已知实数x,y满足条件xy≤64,x≥2,y≥2,则z=log2 (x)+ log2(y)的最小值是

已知实数x,y满足条件xy≤64,x≥2,y≥2,则z=log2 (x)+ log2(y)的最小值是
z=log2 (x)+ log2(y)=log2(xy)>=log2(4)=2
最小值是2