I was fortunate enough to have a very patient math professor in high school who argued with me for days about this topic and eventually I agreed that .9999... =

I was fortunate enough to have a very patient math professor in high school who argued with me for days about this topic and eventually I agreed that .9999... = 1 Not everyone learns this very odd mathematical issue at the same age, some will never hear of it in their entire lives and if they do, will never believe it. Math is abstract, you can't see it to believe it and that's the problem here, you can't see the end of .9999...