# RB14

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bio website location Israel age member for 2 years, 9 months seen 12 hours ago profile views 8

# 6 Questions

 6 How to prove $\cosh(x) \ge 1$ without the $\cosh^2x-\sinh^2x=1$ identity 5 How do you find the limit of $\lim\limits_{x\rightarrow 0^-}\frac { \arcsin{ \frac {x^2-1}{x^2+1}}-\arcsin{(-1)}}{x}$? 3 In how many sequences of length $n$, the difference between every 2 adjacent elements is $1$ or $-1$? 1 how do I prove that in a finite field, the ($p$th) power of a sum is the sum of the powers? 1 Existence of $k$-regular trees with $n$ vertices

# 98 Reputation

 +5 Existence of $k$-regular trees with $n$ vertices +15 In how many sequences of length $n$, the difference between every 2 adjacent elements is $1$ or $-1$? +25 How do you find the limit of $\lim\limits_{x\rightarrow 0^-}\frac { \arcsin{ \frac {x^2-1}{x^2+1}}-\arcsin{(-1)}}{x}$? +5 How to prove $\cosh(x) \ge 1$ without the $\cosh^2x-\sinh^2x=1$ identity

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# 11 Tags

 0 calculus × 2 0 abstract-algebra 0 recurrence-relations 0 finite-fields 0 combinatorics 0 linear-algebra 0 graph-theory 0 trigonometry 0 field-theory 0 algebra-precalculus

# 9 Accounts

 Stack Overflow 172 rep 112 Mathematics 98 rep 7 Unix & Linux 28 rep 3 Mathematica 21 rep 3 Ask Ubuntu 13 rep 5