Let x and y be positive real numbers. Prove that:

I'm not sure how to approach this. Do I simplify/expand somehow or is there a special thing I should do with problems like these.

Please help, thanks, BG

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- Sep 12th 2009, 08:29 AMBG5965Solving an inequality
Let x and y be positive real numbers. Prove that:

I'm not sure how to approach this. Do I simplify/expand somehow or is there a special thing I should do with problems like these.

Please help, thanks, BG - Sep 12th 2009, 10:08 AMred_dog
Use AM-GM inequality:

Now multiply the inequalities. - Sep 12th 2009, 11:19 PMdhiab
- Sep 15th 2009, 08:08 AMBG5965
Sorry, dhiab, but I don't 100% understand your post - especially everything after step 1 (the expansion). E.g. why is suddenly and everything after that.

Could you please explain further. Thanks, BG