inverse function command

[DrD]

I'm sorry for language issues. Technology is a good thing. It should be easy to use, and powerful. Using technology enables learning at a faster rate. Some American students, are using online courses as part of their regular classroom studies.

Who knows what tomorrow brings? It's ok if keypress technology goes away, something better will replace it. Some math teachers are terrible spellers, and some English teachers can not help solve math word problems! Both are well educated. Sometimes what was learned can be forgotten in time. Technology, in some form, will likely be able to help educators, students and others, recall forgotten details better.

Thank you for your help. I appreciate your help, and I hope others do also. Sometimes the prime can be difficult to use. My intention is to help identify areas where the prime seems like it could be improved. I use the prime quite often. Because I use it so often, I find problems where the prime isn't good. Often, it is my fault, and sometimes I'm pretty sure the prime could be improved.

I seek a built in inverse function command, that would be helpful for related problems. It should be an easy command to find in the toolbox, with understandable help documentation.