Determine Whether the Expressions Approach a Limit as B→∞ $b ( b + 3 ) ^ { - 2 }$

Short Answer

Determine whether the expressions approach a limit as b→∞. If they do, give the value of the limit.   $b ( b + 3 ) ^ { - 2 }$ ,   $\frac { 2 \sqrt { b } - 1 } { \sqrt { b } }$ ,   $\mathrm { e } ^ { 3 b }$ + 2
Enter your answer as just $a , b,c$ where these are either limits (integers) or the words "no limit" in the same order they appear above separated by commas.