Approximation

$A_3$

$B_1$

$C_1$

1 term

−2.1999729

1.00040723

0.99999452

2 term

−2.1998869

1.00034130

0.99999045

3 term

−2.1993584

1.00034466

0.99999078

4 term

−2.1993648

1.00034465

0.99999077

5 term

−2.1993648

1.00034465

0.99999077

6 term

−2.1993648

1.00034465

0.99999077

7 term

−2.1993648

1.00034465

0.99999077

8 term

−2.1993648

1.00034465

0.99999077