There is not always one solution.
https://gyazo.com/de488e0362aadcee07b450d1eb0ad8f0
linear function, there is almost always only one solution.
Given quadratic function, most of the time there is either "no solution" or "two solutions".
Quadratic functions "have only one solution" is as rare as linear functions "have no solution"
Similarly for general functions, "there is only one solution" is a rare case
In other words, linear function behavior is rarer in the whole function, but humans tend to misinterpret things as if they were linear functions
The correct answer is "there is no solution."
Not necessarily one.
non-linear
blind spot card 37
---
This page is auto-translated from /nishio/解が一つとは限らない using DeepL. If you looks something interesting but the auto-translated English is not good enough to understand it, feel free to let me know at @nishio_en. I'm very happy to spread my thought to non-Japanese readers.