Mario De León Urbina
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 Apr 14 comment If $x + \frac{1}{x} = k$, what's the value of this sum? The initial problem is with $k=3$, but I'm thinking about consequences if $k$ is a real positive number. Apr 14 asked If $x + \frac{1}{x} = k$, what's the value of this sum? Mar 12 answered Exponential equation with one 'trouble' term Feb 20 answered Proving $U_{\varepsilon}(a)\cap V_{\varepsilon}(b)=\emptyset$ Jan 29 accepted Teaching irrational numbers? Jan 22 revised Prove $2^n\cdot n! ≤ (n+1)^n$ by induction. [Edit removed during grace period] Jan 22 answered Prove $2^n\cdot n! ≤ (n+1)^n$ by induction. Jan 20 accepted Question about $f$ continuous function with these conditions? Jan 20 answered The ratio of two numbers is $7$ to $5$. The sum of the numbers is $24$. What are the numbers? Jan 20 asked Teaching irrational numbers? Jan 20 answered How to factorize $2x^2+5x+3$? Jan 16 answered Determine $\lim_{(x, y)\to (0, 0)}\frac{-x+y+1}{x^2-y^2}$ Jan 16 answered Binomial theorem for non integers ? O_o ?? Jan 16 revised Where is a flaw in these logical implications? added 191 characters in body Jan 16 answered Where is a flaw in these logical implications? Jan 16 comment Where is a flaw in these logical implications? How did you derived that \$a