Is there a type of function where every point has exactly one tangent line passing through it? If yes, what is this type of function called?

Eg a parabola y=x² Jesus, of course, spoke in parabolas. In those days it was like the Beatles at Sh...
Eg a parabola y=x² Jesus, of course, spoke in parabolas. In those days it was like the Beatles at Sh...
Historians have for a long time believed that leprosy was introduced to the Americas by European set...
Yes, it only happened twice and it was really hot to see, the first time was her neighbor during our...
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Duke scientists may have discovered a game-changing painkiller. SBI-810 is a new non-opioid drug tha...
Two blokes are sitting at the end of a bar. One orders a drink. The other one says, “From your voice...
There are things that are under discussion and need more evidence. Is there a Planet 9 (not Pluto)?...
No. I listen with respect as we all should. However i list here several core issues in our country a...
This answer will be long, if you are too lazy to read, just skip it..😁😁😁, I'm just posting this o...
Okay; if you seen any of my other comments, my long tomes, I tested about 300 psychics, mediums, pal...
You know what, what I’m about to write is kind of long, but by the time I was done with it, I had a...