Let x , y be positive integer.

Find x , y : \(\left(1+\dfrac{1}{x}\right)\left(1+\dfrac{1}{y}\right)=\dfrac{3}{2}\)

\(a@b=ab-2\)

Calculate :

\(\left(...\left(\left(1@2\right)@3\right)@4...@2015\right)\)

Let P(x) be a polynomial of degree 2015.

Suppose P(n)=\(\dfrac{n}{n+1}\) for all n = 0, 1 , 2 ,..., 2015.

The value of P(2016) is ...