853 reputation
513
bio website
location Costa Rica
age 26
visits member for 3 years, 4 months
seen Dec 17 at 18:23

I'm bachelor in Math Teaching and Math student. I love maths.


Nov
3
comment Find the value of $\sqrt{10\sqrt{10\sqrt{10…}}}$
Nice And interesant resolution!
Oct
31
comment Am I doing something wrong with this improper integral?
They say that I'm using in a wrong way Barrow's rule.
Oct
29
comment Calculating indefinite integral?
At last line your answer differs with the answer that I put when I asked my question. :)
Jul
17
comment How can I define a “formula” for general term of a sequence with some given values?
No, I forget that, that's the reason for ask my question.
Jul
17
comment How can I define a “formula” for general term of a sequence with some given values?
Well, I know about Lagange's Polynomial, but I read an indian book about this topic, and they don't use that Polynomial there.
Jul
1
comment Solving logarithmic equation?
Textbook says that $\sqrt{2}-1$ is one solution.
Jul
1
comment Solving logarithmic equation?
In the textbook, solutions are $\sqrt{2}-1$ and $-\sqrt{2}-1$. I know this "hunting lion" method, but exact solutions exists.
May
27
comment How do I $n\lambda ^n$ tends to $0$?
I was thinking about this expression in this form today with a friend. Thanks :)
May
26
comment How do I $n\lambda ^n$ tends to $0$?
Yes: $\lim_{x\rightarrow \infty}\frac{\lambda^x}{\frac{1}{x}}$ gives me the indetermination "$0$/$0$" and I need to see the behaviour of $$\frac{ln(\lambda ) \lambda^x}{\frac{-1}{x^2}}$$
Apr
14
comment Prove that a sequence is a Cauchy sequence.
What happens if we have $|s_{n+1}-s_n|< \frac{1}{n}$?
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.
Jan
16
comment Where is a flaw in these logical implications?
How did you derived that $a<x$?
Jan
15
comment How do I prove a bound on the sum of volumes of disjoint rectangles in an oblique rectangle?
Maybe consult "A concise introduction to the Theory of Integration" by Daniel Stroock.
Jan
15
comment Calculate a hard limit
$x$ is a natural number?
Oct
5
comment $\sqrt a$ is either an integer or an irrational number.
Yeah! Niven's Proof!
Aug
16
comment How many integers between $1000$ and $9999$ have distinct digits?
You're right AWertheim.
Jul
2
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".
Dec
26
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.
Dec
6
comment Show $f$ is bounded on $[a,\infty)$ if continuous there and $\lim\limits_{x\to\infty}f(x)$ exists
Let be $\varepsilon = 1$.
Jun
3
comment Integer points in a curve?
Please, edit my question because I'm terrible with my english...