Can anyone tell me how they expanded $x^n-a^n$?
135649
How is $\lim_{x \to a}\left(\frac{x^n - a^n}{x - a}\right) = n\times a^{n-1}$?
48211
When is $(a+b)^n \equiv a^n+b^n$?
115866
Proof by induction; $a^n$ divides $b^n$ implies $a$ divides $b$
133614
Why is $x^{\log_x n}=n$?
8504
Factoring $x^n + y^n$ over the integers
41742
inverse limit of $k[x]/(x^n)$
144067
calculating $a^b \!\mod c$
101792
By expanding $e^x$ into a series prove the following inequality
97469
How to prove $|a^k|=n/\gcd(n,k)$ whenever $|a|=n$?
123195
Prove by induction that a^n+a^-n is an integer.
27147
Proving $n! > n^3$ for all $n > a$
144953
Value of $\frac{x^n -a^n}{ x-a}$?
145256
Expanding out multiplied terms
38636
A basic question about exponentiation: when is $a^{xy}=(a^x)^y$?
19512
Limit $c^n n!/n^n$ as $n$ goes to infinity
118778
What's the inverse operation of exponents?
102138
Why does $\sqrt{x^2}$ seem to equal $x$ and not $|x|$ when you multiply the exponents?