alex.jordan
Reputation
30,681
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30,681 Reputation

18 yesterday
 +10 13:29 upvote Alternative notation for exponents, logs and roots? +10 09:47 upvote The number of real roots of $1+x/1!+x^2/2!+x^3/3! + \cdots + x^6/6! =0$ -2 08:24 downvote Good closed form approximation for iterates of $x^2+(1-x^2)x$
40 2 days ago
 +20 18:45 2 events Good closed form approximation for iterates of $x^2+(1-x^2)x$ +10 03:54 upvote Proof the Fibonacci numbers are not a polynomial. +10 03:19 upvote Prove that: $\sum\limits_{n=1}^\infty \dfrac{n^2}{2^n}=6$.
40 Jul 26
 +20 22:28 2 events Every group of order $567$ has normal subgroup of order $27$. +10 20:27 upvote When is $\binom{2n}{n}\cdot \frac{1}{2n}$ an integer? +10 08:43 upvote Alternative notation for exponents, logs and roots?
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