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user26486

Apparently, this user prefers to keep an air of mystery about them.

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  • Last seen Dec 7 '18 at 20:34

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19 Prove that if $x_1,x_2,\ldots,x_n>0$, then $(1+x_1)(1+x_1+x_2)\ldots(1+x_1+x_2+\ldots+x_n) \ge \sqrt{(n+1)^{n+1}}\sqrt{x_1x_2\ldots x_n}$. Dec 22 '13
17 prove that the equation has just one root. May 18 '15
17 Prove the inequality using AM-GM inequality Jun 22 '15
12 Is it a composite number? Jun 17 '15
12 diophantine equation $x^3+x^2-16=2^y$ Apr 18 '15
11 Compare two powers of numbers without common divisor Jun 1 '15
11 Find all $x,y,z\in\mathbb N$, $x,y,z>1$ such that satisfy $x\mid yz+1$, $y\mid xz+1$, and $z\mid xy+1$ Jan 17 '14
11 If $a^4+b^4\in\mathbb Q$ and $a^3+b^3\in\mathbb Q$ and $a^2+b^2\in\mathbb Q$, prove that $a+b\in\mathbb Q$ and $ab\in\mathbb Q$. May 22 '14
11 How to deduce a closed formula given an equivalent recursive one? Aug 25 '14
10 Why can ALL quadratic equations be solved by the quadratic formula? Feb 3 '15
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