Is this a valid proof that "$1+2+4+8+...=-1$" is a false statement?
23883
$\infty = -1 $ paradox
61604
$V = V_1 + V_2$ confusion? Why is my "proof "incorrect?
65672
Proof of the summation $n!=\sum_{k=0}^n \binom{n}{k}(n-k+1)^n(-1)^k$?
65280
If $a, b, c >0$ prove that $ [(1+a)(1+b)(1+c)]^7 > 7^7a^4b^4c^4 $.
1167
How to prove that $\sum_{k=0}^{n}(-1)^k \binom {n}{k}=0 $
116461
Prove the identity $\sum_{k=0}^{n}(-1)^{k}\binom{n}{k}=0$ using a combinatorial interpretation of the positive and negative terms
89535
fake proof of $\forall a. \forall b. a = b \to 1 = 0$
11642
Proving by induction that $2^n \le 2^{n+1}-2^{n-1} - 1$ . Does my proof make sense?
29692
Proof verification: elementary Number Theory Proof of $am+bn = 1$
5272
Proving that $\sum_{k=0}^{n}\frac{(-1)^k}{{n\choose k}}=[1+(-1)^n] \frac{n+1}{n+2}.$
56169
What mistakes, if any, were made in Numberphile's proof that $1+2+3+\cdots=-1/12$?
143365
Is $\sum_{i=1}^{n-1}i=\binom{n}{2}$?
158862
Show that $a(-1) = (-1)a = -a $.
52113
Proof by Induction $\sum_{i=0}^{k-1} 2^i = 2^k-1$
45037
Show $(2^m-1,2^n+1)=1$ if $m$ is odd
41645
Checking my understanding: $1 - 1 + 1 - 1 + 1 - ... = \frac{1}{2}$
60869
Is induction valid when starting at a negative number as a base case?