exercise6:

  e[k]

0 0.00012606764144908883
1 4.4546937614933085e-05
2 1.7629392930963717e-05
3 7.651341191475258e-06
4 3.5345685416854344e-06
5 1.6944775749795637e-06
6 8.290332491993346e-07

  r[k] = e[k] / e[k+1]

0 2.82999568991311
1 2.526856017639282
2 2.30409185655
3 2.164717164552924
4 2.0859340919445706
5 2.0439199231346388