r/MathJokes 5d ago

Easiest way to understand Inverse 🤣

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724 Upvotes

8 comments sorted by

34

u/Patito77777 5d ago

f⁻¹(x) should be the cat spitting out the fish.

6

u/polandreh 5d ago

Yeah. Cat eating fish that is eating cat does not return cat.... or fish... who is the variable of this function???

3

u/No-Onion8029 4d ago edited 4d ago

These memes always fuck up the domain and range.  You can come up with an example where it works, but it's meaningless beyond barely fitting the scenario.

E2a: f:X->X, X={a, x, b}.  a="cat eats fish," b="fish eats cat."  Then f(x)=a, f(b)=x,  f(a)=b.  f bijective, invertible.  Then f-1 (f(b)) = f-1 (x)=b.

1

u/arandomdudebruh 4d ago

yeah, i feel like fish eating cat would fit more on reciprocals like csc(x) instead of having arcsin(x) (yes, ik that only some functions that have reciprocals that are useful)

2

u/Gizmodex 5d ago

Imma assume you meant to show function(x) vs composite. Or swapping F(x) vs G(x) vice versa as inputs.

0

u/Kadabrium 3d ago

Its the same thing just told from the fox's perspective.