InterviewSolution
Saved Bookmarks
| 1. |
Evaluate: `int(2"x"dot"tan"^(-1)x)/(1+"x"^4)" dx"`A. `(tan^(-1)x^(2))^(2)+C`B. `2tan^(-1)x^(2)+C`C. `(1)/(2)(tan^(-1)x^(2))^(2)+C`D. none of these |
|
Answer» Correct Answer - C Put `tan^(-1)x^(2)=t and(2x)/((1+x^(4)))dx=dt`. `:." "I=tdt=(t^(2))/(2)+C=(1)/(2)(tan^(-1)x^(2))^(2)+C`. |
|