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submitted 1 year ago* (last edited 1 year ago) by hypertown@lemmy.world to c/memes@lemmy.ml
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[-] mumblerfish@lemmy.world 139 points 1 year ago

Same trick will work next year too!

[-] BlueMagma@sh.itjust.works 5 points 1 year ago* (last edited 1 year ago)

Brilliant, now I wonder what ages this works for, I figured only 1 and 2, but then I realised we could write the father's age in other bases..

1 = 2^0 (20 b10)

2 = 2^1 (21 b10)

3 = 3^1 (31 b7 = 22)

6 = 6^1 (61 b4 = 25) if they are lucky the grand father will be 61 that year :-D

8 = 2^3 (23 b12 =27)

9 = 9^1 (91 b3 = 28)

14 = 14^1 (141 b4 = 33)

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[-] TheBat@lemmy.world 117 points 1 year ago
[-] Daft_ish@lemmy.world 12 points 1 year ago

Don't worry it works for all factors of ten. Like 1^0^ = 1

[-] Habahnow@sh.itjust.works 72 points 1 year ago

Took me too long to realize the 0 can be an exponent.

[-] blind3rdeye@lemm.ee 67 points 1 year ago

Ah yes. How fitting for a young new person in the world. A reminder that 2°C of warming above the pre-industrial mean would be catastrophic, but also is a good lower-limit of what to expect based on current intentions.

[-] Random_user@lemmy.world 51 points 1 year ago

Theres no way that a dude that got a girl pregnant at 18 would understand this.

[-] blanketswithsmallpox@lemmy.world 31 points 1 year ago* (last edited 1 year ago)

I know plenty of smart people pretending to be Winnie the Pooh while elbow deep in honey pots. Just because you weren't fucking doesn't mean other nerds weren't lol.

Sucks to be you nerd.

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[-] milicent_bystandr@lemm.ee 16 points 1 year ago

What?! Impossible to start a family at 18 and also enjoy mathematics?

Not everyone who has unprotected sex at 18 (or with an 18 yr old) is some numbskull just going at it for unscrupulous pleasure.

(As another reply also pointed out: the pun was crafted by the OP's dad, not the 1yr-old's dad; and OP could be the child's mum or dad)

[-] gun@lemmy.ml 15 points 1 year ago

He probably didn't. Her dad (the grandpa) made the balloons.

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[-] TheGiantKorean@lemmy.world 50 points 1 year ago
[-] TheGuyTM3@lemmy.ml 25 points 1 year ago
[-] dan@sffa.community 6 points 1 year ago

They'll get complexes

[-] norgur@discuss.tchncs.de 22 points 1 year ago

Kind of hard to define but refer to themselves as I?

[-] ilost7489@lemmy.ca 6 points 1 year ago

Sounds pretty complex

[-] affiliate@lemmy.world 4 points 1 year ago* (last edited 1 year ago)

they live in a different dimension

[-] doctorn@r.nf 21 points 1 year ago

Damn, that took me waaay too long to get...

Not my brightest moment... 😅

[-] hypertown@lemmy.world 20 points 1 year ago

But when you finally get it

[-] ThatWeirdGuy1001@lemmy.world 19 points 1 year ago* (last edited 1 year ago)

I know I'm bad at math but I don't understand how 2x0=0 but 2^0=1

How are they different answers when they're both essentially multiplying 2 by zero?

Someone with a bigger brain please explain this

Edit: I greatly appreciate all the explanations but all they've done is solidify the fact that I'll never be good at math 😭

[-] jendrik@discuss.tchncs.de 28 points 1 year ago

subtracting one from Exponent means halving (when the base is two):

2⁴ = 16 2³ = 8 2² = 4 2¹ = 2 2⁰ = 1

It's a simple continuation of the pattern and required for mathemarical rules to work.

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[-] DSTGU@lemm.ee 15 points 1 year ago

0 is the neutral element for addition. This is why when we have a number then 0 + number = number (0 doesnt change the value in addition) and why 0 x number = 0 (if you add a number 0 times you will have 0). (Multiplication is adding one of the numbers to itself the number of times designated by the second number)

The same way 1 is the neutral element for multiplication. This is why when you have some number then 1 * number = number. This is also why number^0 = 1 (if you never multiply by a number you are left with the neutral element. It would be weird if powering by 0 left you with 0 for example because of how negative powers work)

This is the level 1 answer.

The level 0 answer is that it is this way because all of mathematics is a construct designed to ease problem solving and all people collectively agreed that doing it this way is way more useful (because it is)

Choose which one you want

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[-] TokyoMonsterTrucker@lemmy.dbzer0.com 15 points 1 year ago* (last edited 1 year ago)

Easiest explanation I can think of using the division law for exponents:

Since we can use any number for the initial fraction, as long as the denominator is the same as the numerator, any number to the zeroth power is equal to 1. In general terms, then, for any number, x:

[-] Globulart@lemmy.world 15 points 1 year ago* (last edited 1 year ago)

This isn't strictly speaking a proof, but it did help me to accept it as it demonstrates the function that makes it 1.

2^3 = 2x2x2

2^2 = 2x2

(2^3)/(2^2) = (2x2x2)/(2x2) = 2

= 2^(3-2)

In general terms:

(x^a)/(x^b) = x^(a-b)

If a and b are the same number this is x^0 and obviously (x^a)/(x^a) is one because anything divided by itself is 1.

Hope that helps

[-] hemmes@lemmy.world 5 points 1 year ago

Yes, of course, obviously...JFC, what??

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[-] ShaunaTheDead@kbin.social 8 points 1 year ago

I see other people have posted good explanations, but I think the simplest explanation has to do with how you break down numbers. Lets take a number, say, 124. We can rewrite it as 100 + 20 + 4 and we can rewrite that as 1 * 10^2 + 2 * 10^1 + 4 * 10^0 and I think you can see why anything raised to the 0th power has to equal 1. Numbers and math wouldn't work if it didn't.

[-] lugal@lemmy.ml 8 points 1 year ago

You can think of 1 as the "empty product" (or the "neutral element of multiplication" if you want to be fancy). 2^x means you have x factors of 2. If you have 0 factors, you have the "empty product"

[-] Floey@lemm.ee 7 points 1 year ago

I like to think of it this way:
2^3 is the same as 2 x 2 x 2.
But you can arbitrarily multiply by as many 1s as you want because 1 has the identity property for multiplication.
So we can also write 2^3 as 2 x 2 x 2 x 1 x 1.
2^2 as 2 x 2 x 1 x 1.
2^1 as 2 x 1 x 1.
2^0 as 1 x 1 or just 1.

Multiplying a number by another number is the same as adding a number to itself that many times. And 0 is has the identity property for addition, so similarly:
2 x 3 = 2 + 2 + 2 + 0 + 0
2 x 2 = 2 + 2 + 0 + 0
2 x 1 = 2 + 0 + 0
2 x 0 = 0 + 0

[-] iamkindasomeone@feddit.de 4 points 1 year ago

Its not the same. And theres proof, why.

[-] LordOfTheChia@lemmy.world 4 points 1 year ago* (last edited 1 year ago)

In addition to the explanation others have mentioned, here it is in graph form. See the where the graph of 2^x intersects the y axis (when x=0):

https://people.richland.edu/james/lecture/m116/logs/exponential.html

This also has some additional verbal explanations:

http://scienceline.ucsb.edu/getkey.php?key=2626

The simplest way I think of it is by the properties of exponentials:

2^3 / 2^2 = (2 * 2 * 2) / (2 * 2) = 2 = 2^(3-2)

Dividing two exponentials with the same base (in this case 2) is the same as that same base (2) to the power of the difference between the exponent in the numerator minus the exponent in the denominator (3 and 2 in this case).

Now lets make both exponents the same:

2^3 / 2^3 = 8/8 = 1

2^3 / 2^3 = 2^(3-3) = 2^0 = 1

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[-] affiliate@lemmy.world 12 points 1 year ago

for anyone curious, here's a "constructive" explanation of why a^0^ = 1. i'll also include a "constructive" explanation of why rational exponents are defined the way they are.

anyways, the equality a^0^ = 1 is a consequence of the relation

a^m+1^ = a^m^ • a.

to make things a bit simpler, let's say a=2. then we want to make sense of the formula

2^m+1^ = 2^m^ • 2

this makes a bit more sense when written out in words: it's saying that if we multiply 2 by itself m+1 times, that's the same as first multiplying 2 by itself m times, then multiplying that by 2. for example: 2^3^ = 2^2^ • 2, since these are just two different ways of writing 2 • 2 • 2.

setting 2^0^ is then what we have to do for the formula to make sense when m = 0. this is because the formula becomes

2^0+1^ = 2^0^ • 2^1^.

because 2^0+1^ = 2 and 2^1^ = 2, we can divide both sides by 2 and get 1 = 2^0^.

fractional exponents are admittedly more complicated, but here's a (more handwavey) explanation of them. they're basically a result of the formula

(a^m^)^n^ = a^m•n^

which is true when m and n are whole numbers. it's a bit more difficult to give a proper explanation as to why the above formula is true, but maybe an example would be more helpful anyways. if m=2 and n=3, it's basically saying

(a^2^)^3^ = (aa)^3^ = (aa) • (aa) • (aa) = a^2•3^.

it's worth noting that the general case (when m and n are any whole numbers) can be treated in the same way, it's just that the notation becomes clunkier and less transparent.

anyways, we want to define fractional exponents so that the formula

(a^r^)^s^ = a^r^ • a^s^

is true when r and s are fractional numbers. we can start out by defining the "simple" fractional exponents of the form a^1/n^, where n is a whole number. since n/n = 1, we're then forced to define a^1/n^ so that

a = a^1/n•n^ = (a^1/n^)^n^.

what does this mean? let's consider n = 2. then we have to define a^1/2^ so that (a^1/2^)^2^ = a. this means that a^1/2^ is the square root of a. similarly, this means that a^1/n^ is the n-th root of a.

how do we use this to define arbitrary fractional exponents? we again do it with the formula in mind! we can then just define

a^m/n^ = (a^1/n^)^m^.

the expression a^1/n^ makes sense because we've already defined it, and the expression (a^1/n^)^m^ makes sense because we've already defined what it means to take exponents by whole numbers. in words, this means that a^m/n^ is the n-th square root of a, multiplied by itself m times.

i think this kind of explanation can be helpful because they show why exponents are defined in certain ways: we're really just defining fractional exponents so that they behave the same way as whole number exponents. this makes it easier to remember the definitions, and it also makes it easier to work with them since you can in practice treat them in the "same way" you treat whole number exponents.

[-] kugiyasan@lemmy.one 5 points 1 year ago

Ok, lemme say the line... NEEEEERRRRDD

(btw what's that math syntax, that doesn't look like latex equation mode)

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[-] JesusTheCarpenter@feddit.uk 4 points 1 year ago

That happened

[-] takeda@lemmy.world 4 points 1 year ago

Good luck trying that in two years.

[-] Ghyste@sh.itjust.works 3 points 1 year ago
[-] Random_user@lemmy.world 3 points 1 year ago

Idiots think posting "funny" pictures are memes.

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[-] Prunebutt@feddit.de 3 points 1 year ago

It's not less of a meme than most of the other posts in this community.

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this post was submitted on 11 Oct 2023
990 points (96.3% liked)

Memes

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