0.9....(循環) = 1 [難題]

Pentagon

如何解釋:
; c. x, @" k) g# z1 C5.39.217.76
" u- m) B" {8 T5 ]tvb now,tvbnow,bttvb0.9....(循環) = 1

Pentagon

The answer is:tvb now,tvbnow,bttvb* K# v: L6 R0 d3 w6 f
5 Y) g2 _* F: g! ~, a% @3 z5 |$ c
If 1/9=0.1...(循環)
6 D7 U: C& n# j1 T% _  ]) W% X) cand then 2/9=0.2....(循環)
/ ]+ m  h  J( Rtvb now,tvbnow,bttvband then 3/9=0.3....(循環)tvb now,tvbnow,bttvb+ v; g) ~4 R" |! r
and then 4/9=0.4....(循環)5.39.217.769 \( a6 s- z. d2 [9 b2 t  v" p! _
.......5.39.217.76( B' e& ^: O6 L1 O8 I
and then 8/9=0.8....(循環)
8 z! A9 z* L8 f6 _7 [; N( ^tvb now,tvbnow,bttvb
0 S% j% S1 R: T- [5 C$ G) N, tSo, 9/9=0.9....(循環) =1