Question

Integrala din 3/3+12x patrat.. ma ajuta cineva?

Answer 1

$\int\limits { \frac{3}{3+12x^2} } \, dx=$$\int\limits{ \frac{3}{12( \frac{1}{4}+ x^2)} } \, dx= \frac{1}{4} 2arctg2x+C= \frac{1}{2}arctg2x+C$