1/x+1/y
=1/loga|3+1/logb|3
=log3|a+log3|b
=log3|ab
a+b=2√3≥2√ab,即ab≤3;
当且仅且a=b=√3>1时,取等号;
则log3|ab≤log3|3=1;
即1/x+1/y≤1,
当且仅当x=y=log3|√3=1/2时,1/x+1/y取最大值1.
1/x+1/y
=1/loga|3+1/logb|3
=log3|a+log3|b
=log3|ab
a+b=2√3≥2√ab,即ab≤3;
当且仅且a=b=√3>1时,取等号;
则log3|ab≤log3|3=1;
即1/x+1/y≤1,
当且仅当x=y=log3|√3=1/2时,1/x+1/y取最大值1.