f(x)=7x^6+6x^5...
Radius for initial value
   ii    x              f(x)
    1  0.1715686E+01  0.4557143E+02
    2  0.1501812E+01  0.1453562E+02
    3  0.1359703E+01  0.4365715E+01
    4  0.1290208E+01  0.1117639E+01
    5  0.1273833E+01  0.1812602E+00
    6  0.1273003E+01  0.8355972E-02
    7  0.1273000E+01  0.2063081E-04
    8  0.1273000E+01  0.1267521E-09
Initial value
    rc             -a(1)/n
  0.1273000E+01 -0.1428571E+00
    i    z1             z2             rr
    1  0.1086767E+01  0.3294768E+00  0.1273000E+01
    2  0.1866196E+00  0.1229624E+01  0.1273000E+01
    3 -0.1043004E+01  0.9001473E+00  0.1273000E+01
    4 -0.1372481E+01 -0.3294768E+00  0.1273000E+01
    5 -0.4723339E+00 -0.1229624E+01  0.1273000E+01
    6  0.7572901E+00 -0.9001473E+00  0.1273000E+01
    iii Average error
     12  0.4655072E-35
    i    z1             z2             rr             error
    4 -0.6341119E+00 -0.2876550E+00  0.5692773E+00  0.4380913E-34
    5 -0.6341119E+00  0.2876550E+00  0.5692773E+00  0.4380913E-34
    1 -0.2051437E+00 -0.6837970E+00  0.6866280E+00  0.1555384E-21
    3 -0.2051437E+00  0.6837970E+00  0.6866280E+00  0.5207579E-27
    2  0.4106842E+00  0.6398894E+00  0.8460890E+00  0.5830698E-22
    6  0.4106842E+00 -0.6398894E+00  0.8460890E+00  0.2793043E-34
Values at minimum f(x)
    i    z1             z2             f(z)           iii
    4 -0.6341119E+00 -0.2876550E+00  0.2407412E-34     11
    5 -0.6341119E+00  0.2876550E+00  0.2407412E-34     11
    1 -0.2051437E+00 -0.6837970E+00  0.3009266E-34     12
    3 -0.2051437E+00  0.6837970E+00  0.2481504E-34     12
    2  0.4106842E+00  0.6398894E+00  0.9629650E-34     12
    6  0.4106842E+00 -0.6398894E+00  0.4963008E-34     11