q

x₀

−2

−1

1

2

3

1.8

4

4

3

4

4

1.9

4

3

3

3

3

Absolute error

4.98299E−11

4.44089E−16

2.24532E−12

1.38187E−10

2.1

4

3

3

3

3

Absolute error

1.10953E−10

4.44089E−16

7.34968E−14

3.54139E−11

2.2

4

4

3

3

4

Absolute error

4.44089E−16

1.3034E−13