how to proof formula for general addition rule of three events
53467
Probability of the union of $3$ events?
114212
How to use Mathematical Induction to prove $\frac{1}{1 \cdot 2} + \frac{1}{2 \cdot 3} + \cdots + \frac{1}{n(n + 1)} = \frac{n}{n + 1}$?
147111
Where is the Proof for the Sum-to-Product rule derrived from?
7003
Inductive proof of a formula for Fibonacci numbers
61671
Discrete Math: Writing Proofs
56624
Prove that $0!+1! + 2! + 3! + ..... + n!$ $\neq$ $p^\text{r}$, where $n \geqslant 3$ and $n$, $p$ and $r$ are three integers
12487
Prove derangement formula by induction
114074
Intuitive/Visual proof that $(1+2+\cdots+n)^2=1^3+2^3+\cdots+n^3$
7302
$\sum k! = 1! +2! +3! + \cdots + n!$ ,is there a generic formula for this?
86810
Need intuition about independence of events
116356
Combinatorial proof of $2 \cdot 3^0 + 2 \cdot 3^1 + 2 \cdot 3^2 + \cdots 2 \cdot 3^{n-1} = 3^n-1$
26790
Proving the geometric sum formula by induction
54055
Proof $\prod_{i = 1}^n \frac{n + i}{2i-3} = 2^n(1-2n)$ using inducction
74523
Proof by Cases involving divisibility
112080
Proving the Product Rule for exponents with the same base
124936
Help with a Probability Proof
60860
Combinatorial proof of $\sum_{i = 0}^{n} \binom{i}{r - 1} = \binom{n + 1}{r}$ and then use result to find a formula for $1^2 + 2^2 + \ldots + n^2$