0.9....(循環) = 1 [難題]

Pentagon

如何解釋:
) @: F5 i/ D/ {4 c) I+ l  _4 v( I公仔箱論壇公仔箱論壇: l; w) o" f7 E# w% S
0.9....(循環) = 1

Pentagon

The answer is:
0 ?* Q& L) C# V
" M7 t0 j" p2 @; K) lIf 1/9=0.1...(循環)
: U- u2 s; D# F( @0 U% P' oand then 2/9=0.2....(循環)
4 E& r- T* x7 p; a4 ~and then 3/9=0.3....(循環)公仔箱論壇9 A; A" k* N, M) e9 L! z9 z
and then 4/9=0.4....(循環)tvb now,tvbnow,bttvb6 r) F/ o8 K5 s/ G5 V
.......
; a, ^' w3 y9 h! Q& Q$ |; M5.39.217.76and then 8/9=0.8....(循環)
$ |2 R4 X6 Q) Z- @tvb now,tvbnow,bttvb5.39.217.76( I% M6 n3 V/ _2 ?# r2 S  l1 I# }' m2 _
So, 9/9=0.9....(循環) =1