1.

Evaluate \( \int_{0}^{2} \frac{5 x+4}{x^2+4} \)

Answer»

\(\int_0^2 \frac{5x+4}{x^2+4}dx\)

\(\frac{5}{2}\)\(\int_0^2 \frac{2x}{x^2+4}dx\) + 4 \(\int_0^2 \frac{1}{x^2+4}dx\) 

\(\frac{5}{2}\)\([log(x^2+4)]_0^2\) + \(\frac{4}{2}[tan^{-1}\frac{x}{2}]_0^2\) 

\(\frac{5}{2}\)(log 8 - log 4) + 2 (tan-11 - tan-10)

\(\frac{5}{2}\)log \(\frac{8}{4}\) + 2(\(\frac{\pi}{4}-0\))

\(\frac{5}{2}\) log 2 + \(\frac{\pi}{2}\)



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