Recently, Wazwaz [4] proposed a reliable modified technique of ADM that accelerates the rapid convergence of decomposition series solution. The modified decomposition needs only a slight variation from the standard decomposition method. Although the modified decomposition method may provide the exact solution by using two iterations only and sometimes without using the so-called Adomian polynomials, its effectiveness is based on the assumption that the function can be divided into two parts, and thus the success of the modified method depends on the proper choice of and .