What is wrong with this proof of: $2+2 = 5$
41418
$2+2 = 5$? error in proof
12949
Inductive Proof of Euler's Formula $v-e+r=2$
143026
what's the wrong when we use Euclid logic to prove the twin prime conjecture?
63416
Prove $(n^5-n)$ is divisible by 5 by induction.
134885
proving that $\mathbb{Q}(\sqrt{5}, \sqrt{6}) = \mathbb{Q}(\sqrt{5}+ \sqrt{6}) $
34666
Prove that the expression cannot be a power of 2
82083
Solving $(z+1)^5 = z^5$
56802
Why $\sqrt[3]{{2 + \sqrt 5 }} + \sqrt[3]{{2 - \sqrt 5 }}$ is a rational number?
33402
What is wrong with this funny proof that 2 = 4 using infinite exponentiation?
139755
Prove that $\sqrt{2}+\sqrt{3}+\sqrt{5}$ is irrational. Generalise this.
126429
Let $R=\mathbb{Z}\left[\sqrt{−5}\right]$. Let $I=\left(2,1+\sqrt{−5}\right)$. Show $I^2 = (2)$ in $R$.
133382
Proof that $a+b+\frac{1}{1+\sqrt{ab}}\geq\frac{5}{2}$
56934
How do we prove $\cos(\pi/5) - \cos(2\pi/5) = 0.5$ ?.
62072
Is $2+2=4$ an identity?
79274
$1=2$ | Continued fraction fallacy
52206
How to prove with double counting technique that $1+2+\dots+2^n=2^{n+1} -1$?
108873
How would one be able to prove mathematically that $1+1 = 2$?