∀ {C : Type u_2} [inst : CategoryTheory.Category.{u_1, u_2} C] [inst_1 : CategoryTheory.Limits.HasZeroMorphisms C]
  [inst_2 : CategoryTheory.Limits.HasBinaryBiproducts C] (X Y : C) (n : ℕ) (x : X ⟶ Y),
  nsmulRec (n + 1) x = nsmulRec n x + x