摘 要: | 例解方程 4(x-2)~(1/2)+(y-1)~(1/2)=28-36/(x-2)~(1/2)-4/(y-1)~(1/2)。解:原方程可整理为(4(x-2)~(1/2)+36/(x-2)~(1/2))+((y-1)~(1/2)+4/(y-1)~(1/2))=28。∵4(x-2)~(1/2)>0,36/(x-2)~(1/2)>0,且4(x-2)~(1/2)·36/(x-2)~(1/2)=44,为定值,∴当4(x-2)~(1/2)=36/(x-2)~(1/2)时,即x=11时,4(x-2)~(1/2)+36/(x-2)~(1/2)有最小值24。同理,当(y-1)~(1/2))=4/(y-1)~(1/2)),即y=5时
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