Definition

Let ${X_{n}}, {Y_{n}}, {Z_{n}}$ be Sequence of random variables, $X$ be a Random Variable, $k_{1}, k_{2}$ be constants, then $((X_{n} \to D X) \land (Y_{n} \to D k_{1}) \land (Z_{n} \to D k_{2})) \Rightarrow (Y_{n} + Z_{n} X_{n} \to D k_{1} + k_{2} X)$