Question

Plz solve fast ....
Que :- The Sum of the Series
$\frac{7}{1 {}^{2} + 6 {}^{2} } + \frac{17}{6 {}^{2} + 11 {}^{2} } + \frac{27}{11 {}^{2} + 16{ }^{2} } ... \infty$
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Answer 1

Answer:

By using formulas you have to use