N

$\epsilon ={10}^{-5}$

$\epsilon ={10}^{-8}$

e

r

e

r

8

0.1706

0.6849

0.1706

0.6850

16

0.1061

0.8653

0.1061

0.8589

32

0.0582

0.9230

0.0585

0.9298

64

0.0307

0.9300

0.0307

0.9313

128

0.0160

0.9555

0.0161

0.9565

256

0.0083

0.9685

0.0083

0.9719

512

0.0042

0.9724

0.0042

0.9792

1024

0.0022

0.0021