tại sao lại thế ? why?

C

con_ca_kiem_123

Ba.n ilovetoan sai ro^`i
Bo?i vi` ra^t don gia?n
0,(9) = 9/9 = 1
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C

con_ca_kiem_123

Ba.n ilovetoan sai ro^`i
Bo?i vi` ra^t don gia?n
0,(9) = 9/9 = 1
--------------------------------------------------------------------------------------------------------------------------
 
J

jindo.nguyen

sai het
cac ban lam sai ca rui
hehe
cach lam dung ne
ta co 0.(9)=0.9+0.09+0.009+......
day la mot cap so nhan lui vo han
ta co cong boi la q=0.1
U1=0.9
cong thuc tinh tong cap so nhan lui vo han la
S=U1/(1-q)
=0.9/(1-0.1)
=1
bai giai the nao cac ban
 
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