Stack Exchange
log in
chat
meta
about
Stack Exchange
All Sites
Hot Questions
Top Users
Newsletters
Blogs
tianzhidaosunyouyu
top
accounts
reputation
activity
favorites
subscriptions
Top Questions
17
votes
$5^{x}+2^{y}=2^{x}+5^{y} =\frac{7}{10}$ Work out the values of $\frac{1}{x+y}$
exponentiation
asked Nov 20 '11 at 8:07
math.stackexchange.com
8
votes
Show that $ a，b，c, \sqrt{a}+ \sqrt{b}+\sqrt{c} \in\mathbb Q \implies \sqrt{a},\sqrt{b},\sqrt{c} \in\mathbb Q $
number-theory
asked Apr 25 '12 at 1:15
math.stackexchange.com
8
votes
Factorial Inequality problem
inequality
asked May 12 '12 at 11:01
math.stackexchange.com
7
votes
diophantine equations $x^3-2y^3=1$
diophantine-equations
asked Apr 19 '12 at 4:14
math.stackexchange.com
6
votes
How to expand $\cos nx$ with $\cos x$?
trigonometry
asked Mar 29 '12 at 5:03
math.stackexchange.com
6
votes
Prove that $x ^ 3-y ^ 2 = 2$ only has one solution $(3,5)$
number-theory
diophantine-equations
asked May 24 '12 at 7:11
math.stackexchange.com
5
votes
Please help me prove by induction that $n^n>1\cdot3\cdot5\cdot\ldots\cdot(2n-1)$
inequality
induction
asked Mar 15 '12 at 10:14
math.stackexchange.com
Top Answers
No answers with score of 5 or more
Stack Exchange works best with JavaScript enabled
math.stackexchange.com
