# Mario De León Urbina

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bio website location Costa Rica age 25 member for 2 years, 7 months seen Mar 12 at 22:44 profile views 221

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

# 93 Actions

 Jan8 revised Exponential equation+derivative added 149 characters in body 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 awarded Revival 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? Oct23 accepted Show that $\int_0^\infty e^{-x^2} \sin{2xb}\, dx =e^{-b^2}\int_0^b e^{x^2} \, dx, \, b>0,$? Oct15 revised Show that $\int_0^\infty e^{-x^2} \sin{2xb}\, dx =e^{-b^2}\int_0^b e^{x^2} \, dx, \, b>0,$? added 50 characters in body Oct15 asked Show that $\int_0^\infty e^{-x^2} \sin{2xb}\, dx =e^{-b^2}\int_0^b e^{x^2} \, dx, \, b>0,$? Oct5 comment $\sqrt a$ is either an integer or an irrational number. Yeah! Niven's Proof! Oct2 awarded Critic Aug18 awarded Yearling Aug16 comment How many integers between $1000$ and $9999$ have distinct digits? You're right AWertheim. Jul4 accepted Examples of Metaphors in Statistics and Probability? Jul2 comment Examples of Metaphors in Statistics and Probability? For example, for the concept of "function" we use the metaphor "function is a machine", or for prime numbers: "prime numbers are the bricks of whole numbers". Jul2 asked Examples of Metaphors in Statistics and Probability? Mar8 accepted What's the solution of the functional equation? Feb5 asked What's the solution of the functional equation? Dec26 comment how to calculate area of the image attached If you assume that segments are parallel, then, you can divide in trapezoids and take the length of the heights, to calculate the respective areas. Finally, substract them.