If $$mx^{m} - nx^{n} = 0$$, then the value of $$\frac{1}{x^{m}+x^{n}} + \frac{1}{x^{m} - x^{n}}$$ terms of $$x^{n}$$ is:
Where x, m, n, are x > 0

A

$$2mn/(x{n}(n^{2} + m^{2})$$

B

$$2mn/(x{n}(m^{2} - n^{2})$$

C

$$2mn/(x{n}(m^{2} + n^{2})$$

D

$$2mn/(x{n}(n^{2} - m^{2})$$