482 reputation
418
bio website facebook.com/calvin.dwarandae
location Bogota, Colombia
age 21
visits member for 1 year, 3 months
seen 2 days ago

I love all that tastes like mathematics, particularly number theory and history of mathematics.


Feb
6
comment Solve …
However, wolframalpha.com/input/… gives $(-9,-9/4)$ and $(4,1)$ as answers. So, $|x_1|+|x_2|=|-9|+|4|=13$, and the image says the answer is 5...
Feb
6
comment Is there a formula for finding the number of divisors of $n$ without factorize it?
@ChristopherErnst you are right, sorry, I fixed it.
Feb
6
asked Is there a formula for finding the number of divisors of $n$ without factorize it?
Feb
4
asked Is the set of lines through the origin equals to $\mathbb{R}^2$?
Feb
2
comment Where are the mistakes in the following reasoning?
why not $\frac{d^2 y}{d x^2} = y$?
Jan
25
suggested suggested edit on Trigonometry question (acute angle triangle)
Jan
25
answered Finding vertex of a parabola -conflicting answers
Jan
19
comment Proof of this function
If $x=\Delta x=1$ then left side is equal to $\sqrt{2}$ but right side is equal to $\frac{3}{2}$ so the equality is false.
Jan
19
comment How can I solve $\sin(x)=\sin(2x)$?
Clue: $\sin (2x)=2\sin (x)\cos (x)$
Jan
17
revised Find the values of p for which the series is convergent of the series …
fixed LaTeX
Jan
17
suggested suggested edit on Find the values of p for which the series is convergent of the series …
Jan
16
comment What is the next number of this sequence below?
@Mike I want to know why the answer is 6*9 too...
Jan
15
awarded  Citizen Patrol
Jan
11
comment Calculate the limit.
-1. You can´t take the product rule of limits here: "if you have a limit of a finite products of functions, and the limit of each function exists then the limit of the product is the product of the limits."
Jan
11
answered Proof of the angle sum identity for $\sin$
Jan
7
awarded  Yearling
Nov
27
asked Is the use of L'Hôpital's rule in this limit wrong?
Aug
10
comment Prove that $\sqrt 2 + \sqrt 3$ is irrational
what book are you talking about?
Jun
8
suggested suggested edit on How do i solve $e^{ax}-e^{bx}=c$ for $x$?
Jun
7
reviewed Reviewed Find the equation of a circle given two points and a line that passes through its center