

InterviewSolution
Saved Bookmarks
1. |
Evaluate `int (x^(2)-sqrt(3x)+1)/(x^(4)-x^(2)+1)dx` |
Answer» Correct Answer - `2 tan^(-1)(2x+sqrt(3))+C` `int (x^(2)-sqrt(3x)+1)/(x^(4)-x^(2)+1)dx=int (x^(2)-sqrt(3x)+1)/((x^(2)-1)^(2)-3x^(2))dx` `=int (x^(2)-sqrt(3x)+1)/((x^(2)-sqrt(3)x+1)(x^(2)+sqrt(3)x+1))dx` `=int(1)/(x^(2)+sqrt(3)x+1)dx` `=int (1)/((x+(sqrt(3))/(2))^(2)+(1)/(4))dx` `=(1)/(1//2)"tan"^(-1)(x+(sqrt(3))/(2))/((1)/(2))+C` `=2 tan^(-1)(2x+sqrt(3))+C` |
|