Thank you so much for your help. My student is currently away for a few weeks but we will resume our studies in August. He will be starting his sophomore year this fall and his mathematics studies will take off pretty fast (and certainly pass by my poor memory of what I learned 50 years ago) . His mother is going to secure a copy of the math text book he will be using so I can prepare in advance to help him perform well in class. With your excellent video presentations, I should be able really to help him.

 

Thanks again for your excellent quality and your kind, personalized help.