Table 2 The absolute relative error (88) for the approximation (87) in the case where z=1

20

8.96×10⁻³

500

3.62×10⁻⁴

50

3.61×10⁻³

1500

1.21×10⁻⁴

100

1.80×10⁻³

2000

9.04×10⁻⁵