a. f(x) = 2 cos 2x -x

b. f(x)=x² Inx+1

5. Use the most accurate three-point formula to determine each missing entry in the following tables.

a.

x

f(x)

f'(x)

b. x

f(x)

f'(x)

1.1

9.025013

1.2 11.02318

1.3 13.46374

1.4 16.44465

8.1

8.3

8.5

8.7

16.94410

17.56492

18.19056

18.82091