Question

Inregrala definita de la 2 la 1 din 2x+1/x^2+x+1

Answer 1

∫₂¹ (2x+1)(x²+x+1) dx =

= -∫₁² (x²+x+1)'/(x²+x+1) dx =

= -ln|x²+x+1| |₁² = -ln(7) + ln(3) =

= ln(3/7)