First question: What have you learned recently (if this is for a class), or what do you know that might be relevant (if this is, say, for a contest)?

Second question: Have you tried just experimenting with small values of n? For example, if n is 2, it's claiming that a/b + b/a is always at least 2, for any positive numbers. And if all the x's are equal, then you get equality. These sorts of activity sometimes help you gain insight into a problem.

I'm wondering if this could be a minimization problem in calculus. Or maybe induction would work.

In any case, we want to see not just

**that **you tried and failed, but

**what **you tried and

**how **you failed! Then we can help.

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