Pachpatte在參考文獻[11]中所給的定理1與定理2的證明是較困難的，而且使用到參考文獻[7]的定理1.1.2。這篇論文主要的目的是給一個簡單而且直接的證明，而不使用[7]的定理1.1.2。此外，在[11]的定理2中，(b2)和(b3)部分的證明被省略，我們將在這論文中給出證明。 The proofs of Theorem 1 and Theorem 2 given by Pachpatte in [11] is hard and has used Theorem 1.2.1 in [7] . The main purpose of this note is to give a simple and straightforward proof without using Theorem 1.2.1 in [7] . Also the proofs of parts of (b2) and (b3) in Theorem 2 is skipped in [11] , we shall supply the proofs in this note .
