Part 12

Level pending

Let \[2015< a\leq 2016\] Find the minimum value of \[a+\frac{1}{a}\] Note:The answer can be round to the nearest interger

See this and this.

You can see how to direct x,y,z... when the equality hold from this problem.And direct x,y,z it's easy to solve this problem according my way in two problem above

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