(来学网)等于下列哪个函数?
  • A.
    (来学网)[f(x)+f(x-a)]dx
  • B.
    (来学网)[f(x)+f(a-x)]dx
  • C.
    (来学网)[f(x)-f(a-x)]dx
  • D.
    (来学网)[f(x)-f(x-a)]dx