@acer Right, sorry, didn't catch that... I have corrected the post now.

Lets say I didn't know what V was, but was asked to keep it a low as possible when finding R. How would one use maple to do this with some smart one-liner?

I have used a graphing method below, is there a faster, better way?

@ .... of course...! Thanks

@tomleslie 

Thanks alot..!

What does interface(showassumed=0): do?

Did you deduce that the mu and lambda had to be larger than zero becuase of the given answer or because of your knowledge of the exponential distribution?

Lesson learned =

lambda, rate parameters are never under zero by definition, and must be specified when integrating.

@Axel Vogt Done, thanks for the advice. Used Maple math but code snippets are obviously better.