Quantitative Aptitude Algebra Identities

\(\frac{1}{(n - 5).(n -4)} + \frac{1}{(n - 4).(n -3)} + \frac{1}{(n - 3).(n -2)} + .... +\ \frac{1}{(n + 4).(n + 5)}\) విలువ?

1
\(\frac{10}{(n^2 - 5)}\)
2
\(\frac{10}{(n^2 - 16)}\)
3
\(\frac{10}{(n^2 - 25)}\)
4
\(\frac{8}{(n^2 - 16)}\)

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