0.9....(循環) = 1 [難題]

Pentagon

如何解釋:
) s; ^+ R2 B% u7 w' L5.39.217.775.39.217.77+ _$ g3 m: d5 n+ q( j, d$ D
0.9....(循環) = 1

Pentagon

The answer is:
6 j4 b" R" u- Y$ y( B1 C0 d" gtvb now,tvbnow,bttvb公仔箱論壇/ D% \8 e* I+ @' }4 `7 C
If 1/9=0.1...(循環)- \' ?$ J( _! c, u" L! @
and then 2/9=0.2....(循環)
1 y" {  `" B" f' [# `; K1 R. G3 J4 Stvb now,tvbnow,bttvband then 3/9=0.3....(循環); E0 {* z  ^* c2 l9 I0 a
and then 4/9=0.4....(循環)
3 Z6 E, D7 s5 [& _# G6 u6 X. L- l5.39.217.77.......tvb now,tvbnow,bttvb! {; ?+ R/ \- }! l
and then 8/9=0.8....(循環)
6 D" c+ O1 H% S( Ktvb now,tvbnow,bttvb6 n. w; F9 V7 P
So, 9/9=0.9....(循環) =1