निम्नलिखित समाकलों के मान ज्ञात कीजिए-
(a) `int (x^(2)+1)/(x^(4)+x^(2)+1) dx` (b) `int (x^(2)-1)/(x^(4)+x^(2)+1) dx`

Answer

(a) `1/sqrt(3) tan^(-1) ((x^(2)-1)/(xsqrt(3)))+c` (b) `1/2 log |(x^(2)-x+1)/(x^(2)+x+1)|+c`