以下是求定积分fi xlnxdx的步骤,请把正确步骤-|||-选出并进行排序。 ()-|||-a. (int )_(1)^eln xd(dfrac (1)(2)(x)^2) b. dfrac (1)(2)(x)^2ln x(|)_(1)^e-(int )_(1)^edfrac (1)(2)(x)^2d(ln x)-|||-C. dfrac (1)(2)(x)^2ln x(int )_(1)^e+(int )_(1)^edfrac (1)(2)(x)^2d(ln x) d. dfrac ({e)^2}(2)-dfrac (1)(2)(int )_(1)^exdx-|||-e. dfrac ({e)^2}(2)+dfrac (1)(2)(int )_(1)^exdx f. dfrac (1)(4)((e)^2+1) g. dfrac (1)(4)((e)^2-1)-|||-A. a-c-e-f-|||-B. a-b-d-f-|||-C. -c-e-9-|||-D. a-b-e-f