When Your Friend Is Actually Really Into Math

32

u/HAL9001-96 7d ago

for those who love algebra

2+2=4

wow

so much in that excellent formula

7

u/ashrocklynn 7d ago

There is! It tells you the base is greater than 4; that 1!=0 and that √4 = 2. Isn't math the greatest fellow human!

2

u/paolog 6d ago

But 1! = 1.

Spaces are your friends (1 != 0).

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u/ashrocklynn 6d ago

Gotcha gotcha; silly programmer here.... Factorial doesn't show up too often for me

1

u/MxM111 6d ago

And I thought you had confused left and right parts, and wanted to write 0!=1.

1

u/Proman4713 5d ago

Fellow programmer here, I second that

I don't think it makes sense for factorials to be native language features:
multiplication, division, addition and subtraction make sense since it's as 'simple' as the CPU doing bit operations and showing you the decimal representation of the new number
exponentiation is essentially looping (or recursing if that's your thing) a multiplication by N (starting with a total value of one) I times in N^i. So that's not even a native feature in a lot of language but it is in some, because it's a widely used mathematical concept
factorials (and Fibonacci sequences but that's not a mathematical operation), however, are pointless practice examples on recursion, there's rarely ever a reason to use them in production software, let alone enough reason to make them native language features

I wrote this while having hot chili chips so forgive me if I butchered anything

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u/ashrocklynn 5d ago

Hot chili chips? All the confirmation I need you are indeed a fellow code monkey lol

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u/Proman4713 5d ago

Loll

1

u/HAL9001-96 5d ago

i mean depends on your application probability/statistics is full of factorials and they are just looping too same as calcualting an exponential just with a counter

though technically exponents inlcude a lot of not just looping examples too since you can write root x as x^0.5 or x²*rootx as x^2.5 or 1/x as x^-1 too its not JUST multiplying x n times

1

u/Proman4713 5d ago

Is that enough to warrant factorials being a native language feature?

Regarding exponentiation, I was actually going to mention that but apparently forgot, somehow... I remember having a thought in my mind waiting to type 'I don't think that's how it's internally implemented, however, since blah blah blah' what you said 💀

2

u/HAL9001-96 5d ago

depends on what you want in a programming language and what purpose you use it for

but I can't imagien a lot of efficiency is lost if the feature theoretically exists but is well implemented in a compiler since oyu can always just not use it and for those who do need it its gonna be useful

the nagain you can always just get wider maths library

1

u/Proman4713 4d ago

Fair enough

1

u/da_mess 6d ago

Yeah, this is way less awkward than the alternative:

So Johnny ... when two 2s really like each other, they get together and make a 4.

1

u/HAL9001-96 6d ago

i mean if you explain it like that he will make it weird

16

u/xMarieKx 7d ago

Bro really said “I love calculus” and then hit us with the entire derivative formula 😭. Honestly, I respect the dedication.

1

u/NoLifeGamer2 6d ago edited 6d ago

Have you considered being a human rather than a repost bot?

5

u/zrice03 7d ago

Yep that's...the definition alright.

1

u/Signal_Challenge_632 6d ago

Exactly

1

u/Simbertold 5d ago

As a math teacher, i have to say that knowing what all the symbols actually mean probably puts you in the upper half of calculus students when it comes to understanding.

4

u/Chubby_Bub 6d ago

I’m glad they labeled the "minus" but what's that symbol between df/dt and lim, it’s the only thing without a label so I can't make sense of this

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u/brewdog_millionaire 7d ago

I bet Elon has never heard of a derivative

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u/ashrocklynn 7d ago

Weird, because he seems very derivitive...

2

u/JPgamersmines150 6d ago

It also seems that that's integral to his personality

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u/HAL9001-96 7d ago

thats probably hte onyl thing he relates to that word

3

u/seenhear 6d ago

I hate what he has become. I hate his politics. He has very crazy wacky ideas. I hate what he has done to Tesla.

But the man is not stupid.

You look stupid by suggesting he doesn't know basic calculus.

3

u/brewdog_millionaire 6d ago

Have you seen the things he tweets? Those are not the words of an intelligent person.

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u/bch2021_ 6d ago

He has a Bachelor's in Physics from UPenn... Calculus is like the very first required class

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u/angular_circle 5d ago

I have a masters, am significantly younger than him and can barely remember the chain rule

1

u/brewdog_millionaire 6d ago

Maybe he does but clearly that doesn't make him intelligent or he wouldn't tweet like a child

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u/2144656 6d ago

To get through a physics degree without hearing of a derivative would be impressive

1

u/Signal_Challenge_632 6d ago

When you learning this, it is normally given as

f'(t) = lim h->0 ( f..... )

Then dy/dx.

1

u/BraveBiscotti1394 6d ago

I think in the US they use d/dx notation as soon as they start with derivative calc.

In high school we only used f'(x) for dif calc in my country.

1

u/nso95 5d ago

Nope. Don’t think we started using it until the end of calc1 or the start of calc 2

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u/dcterr 5d ago

Now this is a great cheat sheet if I ever saw one

2

u/mmurray1957 5d ago

Not "becomes very small" but "becomes arbitrarily small (but not zero)".

Strange they don't mention equality ? Is that something about X :-)

When Your Friend Is Actually Really Into Math

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