I need a limit problem that equals 30. I would like to have infinity in it but i dont know how.
Steven's answer is correct. Depending on the exact instructions, there may be simpler solutions:
The limit of x as x approaches 30 is 30.
The limit of 30 as x approaches anything, including infinity, is 30.
The limit of 30x/(1+x) as x approaches infinity is 30. If your assignment has to do with L'Hopital's rule, then this might be an appropriate answer.