Question
The least upper bound of a set of real numbers in (0,1) whose decimal expansions do not contain the digit 9 is k/9. What is the value of k?
thanks!
thanks!
Answers
Steve
The largest number in (0,1) with no 9 is
.88888888888888888888888... = 8/9
.88888888888888888888888... = 8/9