√11 = 3 + 1/(1.5 + 0.5√11)
√11 = 3 + 1/(3 + 1/(3 + √11))
Jetzt kannst du für √11 wieder den Kettenbruch einsetzen
√11 = 3 + 1/(3 + 1/(3 + 3 + 1/(3 + 1/(3 + √11))))
√11 = 3 + 1/(3 + 1/(6 + 1/(3 + 1/(3 + √11))))
√11 = 3 + 1/(3 + 1/(6 + 1/(3 + 1/(3 + 3 + 1/(3 + 1/(3 + √11))))))
√11 = 3 + 1/(3 + 1/(6 + 1/(3 + 1/(6 + 1/(3 + 1/(3 + √11))))))
Also als Kettenbruch
[3, 3, 6, 3, 6, 3, 6, ...]