2^-23=10^-k (a)
=>-23 log 2 = -k+log a
=>-6.9236899002715674899159945786633=-k+log a
Since log a should be a positive number,
so k must be >-6.9236899002715674899159945786633
=> k =7 ,
-6.9236899002715674899159945786633+7=log a
log a=0.07631009972843251008400542133666
a=1.1920928955078124999999999999982
so a =1//
2008-12-29 11:39:59 補充:
不過我憺心你明唔明我講咩.....
BECAUSE I MA POOR PERSENTATION...