2 + 2 = 5 Fun mathematics Rules of mathematics proof

2 + 2 = 5 Fun mathematics Rules of mathematics

[itsCwsg]

for those who don't understand, here is a very short and brief explanation to why 2+2=4
Let us consider two sets A and B, such that A = {a, b} and B = {c, d}, where a, b, c, and d are distinct elements. Then, the cardinality of A, denoted by |A|, is the number of elements in A, which is 2. Similarly, the cardinality of B is also 2. Now, let us define a function f: A -> B, such that f(a) = c and f(b) = d. This function is a bijection, meaning that it is both one-to-one and onto. A one-to-one function is a function that maps distinct elements of the domain to distinct elements of the codomain. An onto function is a function that maps every element of the codomain to some element of the domain. A bijection is also called a one-to-one correspondence, because it establishes a perfect pairing between the elements of the two sets.

Now, let us consider the union of A and B, denoted by A ∪ B, which is the set of all elements that are in A or in B or in both. In other words, A ∪ B = {a, b, c, d}. The cardinality of A ∪ B is the number of elements in A ∪ B, which is 4. However, we can also express the cardinality of A ∪ B in terms of the cardinalities of A and B, using the following formula:

|A ∪ B| = |A| + |B| - |A ∩ B|,

where A ∩ B is the intersection of A and B, which is the set of all elements that are in both A and B. In this case, A ∩ B = ∅, which is the empty set, meaning that A and B have no elements in common. The cardinality of the empty set is 0, by definition. Therefore, we can simplify the formula as follows:

|A ∪ B| = |A| + |B| - |∅| = |A| + |B| - 0 = |A| + |B|.

Substituting the values of |A| and |B|, we get:

|A ∪ B| = 2 + 2.

Hence, we have shown that the cardinality of the union of two sets, each with two elements, is equal to the sum of the cardinalities of the two sets. In other words, we have shown that:

2 + 2 = 4.
if you still don't understand here is another brief explanation

Let x and y be two natural numbers such that x = y = 2. Then, by the definition of addition, x + y is the cardinality of the disjoint union of two sets A and B, where A and B have cardinalities x and y respectively. That is, x + y = |A ∪ B|, where A ∩ B = ∅. Now, by the axiom of choice, there exists a bijection f: A ∪ B → {1, 2, ..., x + y}. Therefore, x + y is the smallest natural number n such that there exists a bijection f: A ∪ B → {1, 2, ..., n}. By the well-ordering principle, such a natural number n exists and is unique. Hence, x + y is well-defined.

Now, let us consider the specific case where x = y = 2. Then, A and B are two sets with cardinalities 2, and A ∪ B is a set with cardinality 4. By the definition of cardinality, this means that there exist bijections g: A → {1, 2} and h: B → {3, 4}. Then, we can define a bijection f: A ∪ B → {1, 2, 3, 4} as follows:

f(a) = g(a) if a ∈ A
f(b) = h(b) if b ∈ B

It is easy to verify that f is indeed a bijection. Therefore, by the definition of x + y, we have x + y = 4. Hence, 2 + 2 = 4.

[rithikr]

You cannot cancel out the 0.It basically is like 4*0=5*0.that would mean 0=0 not 4=5

[willman]

This is why people don't take college students seriously anymore.

[kunaljoshi]

That's dumb when you cancel 5-5 both side it's actually 0/0 which indeterminant so the can't be cancelled

[Funburst]

Roses are red
Violets are blue
We got scammed
He got views😂☠️💀

[Capitaine]

It is not possible to delete 5-5 from both sides of the equation, because in this case we have divided both sides of the equation by zero, and the divisor by zero is not defined in algebra.

[bonbon]

Zero cannot be cancelled out. It is because any number*0= any number*0, it is a mistake.

[reenasaini]

I see what you're trying to do! You're using a creative combination of equations and manipulations to arrive at the conclusion that 2+2=5. However, I have to respectfully point out that there are some errors and inconsistencies in your proof.

Here's a breakdown of where things go awry:

- You start with a true statement: 0=0
- Then, you equate "2+2" and "5" as equal, which is not true
- The subsequent equations and manipulations are based on this false premise
- You're using a mix of equations and algebraic manipulations that don't follow the usual rules of mathematics
- The conclusion "4=5" and "2+2=5" are not supported by the preceding equations

Remember, in mathematics, we need to follow established rules and axioms to ensure the accuracy and validity of our calculations and proofs. While I appreciate your creativity, this proof doesn't quite hold up to scrutiny. Would you like to try again or explore a different mathematical concept?

[ultrainferno]

that's not 4+0 but 4*0 and it equals 0 and it's the same thing for the 5

[Minino_Bababoey]

Peoples who don't understand: *Bully*

Peoples who understand: 💀

[gourabghosh]

indeterminate as 0/0 form. possible if value close to 0 is taken or, limit is x->0

[NoBody-elpf]

People in comment he is wrong
Me : he is right
Why: because he prove it. Question was not 2+2 is 5 but was prove 2+2 = 5

If u have some knowledge around indian 10th+ then u will know it.

[mtjfebq]

Хых это называется математический софизм твоя ошыбка в том что (5-5) нельзя сокрощать если со кротить то получится деление на ноль😎

[Ayush_sharma]

Imagine you have 2 apples and eat 2 apples. How many apples are left? None, right? It wouldn't magically turn into 5 apples.

The steps you showed involve "taking away" the same thing from both sides repeatedly. It's like taking away the same number of candies from two different piles and saying the remaining piles magically have the same number of candies even though they started with different amounts.

In mathematics, there are specific rules to ensure things make sense. Just like you can't add 2 candies and 3 candies and get 5 candies (you'd get 5!), the statement 2 + 2 = 5 doesn't work within those rules.

[ryanzeutzius]

Tell me you're dumb without telling me you're dumb:

[benhenderson]

Firstly, there are plenty of people at so-called respectable jobs that would not see the error in the proof so let’s not hate on people who put food on your table.

Secondly the P in PEMDAS is first for a reason.

[Dailypost-sukm]

The statement "2+2=5" is generally false in standard arithmetic. However, it has been used in various contexts, often to illustrate specific points or themes:

1. **Orwellian Example**: In George Orwell's novel "1984, " the phrase "2+2=5" is used as an example of how a totalitarian regime can manipulate reality and force people to accept false truths as part of its control over thought and belief.

2. **Satirical or Absurdist Contexts**: It can be used humorously or absurdly to highlight illogical thinking or to mock flawed reasoning.

3. **Mathematical Base or Error**: In some non-decimal number systems or through deliberate errors, one could incorrectly manipulate symbols to arrive at "2+2=5." For instance, with rounding in a real-world context, 2.4 + 2.4 might be approximately expressed as 2+2=5 due to rounding up both numbers.

In normal arithmetic, though, 2 + 2 always equals 4.

[lusr]

There are movies about torturing People who think 2+2=4. Those are bad.

[rajeshrawani]

Kyunki jab tum 4 ko common liya to five ko kyon nahin liya lekhakar to deko 😅 😅 😂 😂

[ZachariasLayleroy]

Last ligne he did simplification, that means multiplying by 1/(5-5) and that is equivalent to multiplying all that stuff by 1/0.
Number that doesn't exist