Advertisements
Advertisements
Question
Evaluate : `int 1/(x^2 + 8x + 20)` dx
Sum
Solution
Let I = `int 1/(x^2 + 8x + 20)` dx
= `int 1/(x^2 + 8x + 16 + 4)` dx
= `int 1/((x +4)^2 + 2^2)` dx
= `1/2 tan^(-1) ((x + 4)/2) + c`
shaalaa.com
Is there an error in this question or solution?
