It looks like an alternating series, so It’s likely from a physics class involving electrostatic or maybe control systems. It also could be from a later calculus class where you’re first introduced to alternating series like Taylor or Leibniz.

What issues? I have used for… I don’t even know. Feels like since my first smart phone.

Always start with a free-body diagram

Reading this gave me anxiety.

Imagine that feeling of cruise control 10x. It’s just a better driving experience.

On the highway, I haven’t had it fail or do anything weird in over a year. I watch the road, but keep my hands off. Daily commute, especially when there’s traffic, is much less of a mental burden. I’m much more at ease to check my phone or look up a song. Local roads, I keep my hand a 3’ o’clock while on the armrest. Not as liberal with diverting my eyes. Letting it do all the work makes driving better, it’s definitely more relaxing.

Everyone hates on Tesla for obvious CEO reasons , but Tesla still has great cars. I test drove every electric car manufacturer and model available in central Florida throughout 2021/2022. The model y is by far the best in nearly every aspect. Nothing comes close.

My model y had one panel issue. They gave me a loaner car, it was fixed in 2 days. I haven’t had any issues since. I drove it from Orlando, Florida to Toronto,CA and back without issue. It calculates where and how long to charge to continue your trip.

Again, everyone gives it shit but the “self-driving” is 10/10 on the highway ( 7/10 on local roads). It’s not fancy lane assist and you’d have to be literally sleeping at the wheel to crash while it’s engaged. It made driving there and back a breeze.

Best car I’ve driven so far. Hands down.

“nailed to your fire place” - aren’t these made of brick?