Cho \(\int_0^2 {\frac{{{x^2} + 5}}{{{x^2} + 4}} =...

Câu hỏi: Cho \(\int_0^2 {\frac{{{x^2} + 5}}{{{x^2} + 4}} = a\pi  + b,\left( {a,b \in R} \right)} \). Hãy tính ab

A. \(ab = \frac{1}{{10}}\)

B. \(ab = \frac{1}{{15}}\)

C. \(ab = \frac{1}{{8}}\)

D. \(ab = \frac{1}{{4}}\)