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...
I don’t know! Hell, I grew up sharing a room with my (step-)sister for a while and frankly it was te...
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LOL!!…It’s pretty much a guy thing. Give you an example : Let’s say I am home on a three to four day...
I’m a bi-girl who loves group fun. Back in college, I met my crush and I was infatuated with her for...
Appunto per questo ti volevo incontrare, semplicemente per capire ed evitare così rotture traumatich...
No philosophical, scientific or common sense has gone into explaining the cause of Climate Change. A...
This is what is like in Chinese factories today. Once was busy! I received this email from a Chinese...
Well, considering there are people today who like the 298,000BCE technology of sexual intercourse, I...
"By studying these planets, we can better understand how planets form in general, a bit like peering...
My mother is an eye doctor with a specialty in eye diseases. So in a way a double specialty. She was...
An accidental discovery in an astronomy show offers researchers a new clue about the mysterious Oort...