An Effective Solution of the Cube-Root Truly Nonlinear Oscillator: Extended Iteration Procedure

Table 4

Comparison of the approximate frequency-amplitude relations with exact results of .

	Er (%)	Er (%)	Er (%)	Er (%)
0.1	5.54344; 3.4	5.32326; 0.68	5.37561; 0.29	5.36609; 0.12	5.35964
0.5	1.89583; 3.4	1.82053; 0.68	1.83843; 0.29	1.83518; 0.12	1.83297
1	1.19430; 3.4	1.14686; 0.68	1.15814; 0.29	1.15609; 0.12	1.15470
5	0.40844; 3.4	0.39222; 0.68	0.39608; 0.29	0.39538; 0.12	0.39490
10	0.25730; 3.4	0.24708; 0.68	0.24951; 0.29	0.24907; 0.12	0.24877
50	0.08780; 3.4	0.08450; 0.68	0.08533; 0.29	0.08518; 0.12	0.08508
100	0.05543; 3.4	0.05323; 0.68	0.05376; 0.29	0.05366; 0.12	0.05360
500	0.01896; 3.4	0.01821; 0.68	0.01838; 0.29	0.01835; 0.12	0.01833
1000	0.01194; 3.4	0.01147; 0.68	0.01158; 0.29	0.01156; 0.12	0.01155