(x+1)/(x^2+2x)的不定積分怎麼求?

(x+1)/(x^2+2x)的不定積分怎麼求?


答:
∫[(x+1)/(x^2+2x)]dx
=(1/2)∫{1/[(x+1)^2-1]} d [(x+1)^2-1]
=(1/2)ln[(x+1)^2-1]+C
=(1/2)ln|x^2+2x|+C