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 Yearling
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May
15
revised Simplify the expression (combination and factorial)
corrected title
May
15
suggested approved edit on Simplify the expression (combination and factorial)
May
6
reviewed Reviewed Algorithm for optimal distribution of objects on a numberline
Jan
7
awarded  Yearling
Sep
30
awarded  Explainer
Sep
3
awarded  Popular Question
Aug
3
answered In calculus, which questions can the naive ask that the learned cannot answer?
Jul
17
awarded  Civic Duty
Jul
2
awarded  Curious
Jun
28
comment Is some thing wrong with the epsilon-delta definition of limit??
+1 for the analogy.
Jun
3
awarded  Peer Pressure
May
23
awarded  Popular Question
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 rejected 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.