I was put through the ringer on Louis Leithold "Calculus, with analytic, geometry". Heavy heavy book. "Do the exercises" teacher echoed over and over. I read t

I was put through the ringer on Louis Leithold "Calculus, with analytic, geometry". Heavy heavy book. "Do the exercises" teacher echoed over and over. I read the chapter, I followed the examples and proceed to the first problem in the unit. My answer was 64 I go to the end of the book and the answer was 2 1/4 I would try to reverse engineer the 2 and 1/4 to original problem... Nothing! I would ask a friend to the problem with me.. her answer was 16. Maybe divide by 8? that gets us 2, we are closer? Right. Why divide by 8? I don't know! Back in the there was no Internet or Kahn Academy. It was you and the red heavy book of Calculus with the desk lamp staring at you. Silently.