不定积分(来学网))]dx等于:
  • A.
    (来学网)ln|1+f(x)|f+c
  • B.
    (1/2)1n|1+f(来学网)(x)|+c
  • C.
    (来学网)arctanf(x)+c
  • D.
    (来学网)(1/2)arctanf(x)+c