X>1,Y>1,(log2下标X)*(log2下标Y)=1,则XY最小直是?
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![X>1,Y>1,(log2下标X)*(log2下标Y)=1,则XY最小直是?](/uploads/image/z/11665296-0-6.jpg?t=X%3E1%2CY%3E1%2C%28log2%E4%B8%8B%E6%A0%87X%29%2A%28log2%E4%B8%8B%E6%A0%87Y%29%3D1%2C%E5%88%99XY%E6%9C%80%E5%B0%8F%E7%9B%B4%E6%98%AF%3F)
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X>1,Y>1,(log2下标X)*(log2下标Y)=1,则XY最小直是?
X>1,Y>1,(log2下标X)*(log2下标Y)=1,则XY最小直是?
X>1,Y>1,(log2下标X)*(log2下标Y)=1,则XY最小直是?
X>1,Y>1
log2下标X>0 log2下标Y>0
(log2下标X)+(log2下标Y)>=2*根号下[(log2下标X)*(log2下标Y)]=2
即log2下标(xy)>=2
xy>=2^2=4