# Mario De León Urbina

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bio website location Costa Rica age 25 member for 2 years, 8 months seen 12 hours ago profile views 229

I'm bachelor of Math Teaching and Economics student in the UCR. I love maths. $\sqrt { God} = love$

# 36 Posts

 Apr14 asked If $x + \frac{1}{x} = k$, what's the value of this sum? Mar12 answered Exponential equation with one 'trouble' term Feb20 answered Proving $U_{\varepsilon}(a)\cap V_{\varepsilon}(b)=\emptyset$ Jan22 answered Prove $2^n\cdot n! ≤ (n+1)^n$ by induction. Jan20 answered The ratio of two numbers is $7$ to $5$. The sum of the numbers is $24$. What are the numbers? Jan20 asked Teaching irrational numbers? Jan20 answered How to factorize $2x^2+5x+3$? Jan16 answered Determine $\lim_{(x, y)\to (0, 0)}\frac{-x+y+1}{x^2-y^2}$ Jan16 answered Binomial theorem for non integers ? O_o ?? Jan16 answered Where is a flaw in these logical implications? Jan15 asked Exponential equations solving methods? Jan9 answered Pedagogy: How to cure students of the “law of universal linearity”? Jan9 answered Why is $\tan((1/2)\pi)$ undefined? Jan8 answered Exponential equation+derivative Jan8 answered Prove that $\displaystyle \lim\limits_{n \rightarrow \infty} \left(\frac{23n+2}{4n+1}\right) = \frac{23}{4}$. Jan8 answered $\lim_{n\rightarrow \infty }{a_n}^{b_n}=\alpha ^\beta$? Dec4 answered Prove that if $x$ is a non-zero rational number, then $\tan(x)$ is not a rational number and use this to prove that $\pi$ is not a rational number. Dec2 asked Question about $f$ continuous function with these conditions? Oct15 asked Show that $\int_0^\infty e^{-x^2} \sin{2xb}\, dx =e^{-b^2}\int_0^b e^{x^2} \, dx, \, b>0,$? Jul2 asked Examples of Metaphors in Statistics and Probability?