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location Buenos Aires, Argentina
age 20
visits member for 3 years, 5 months
seen 12 hours ago

(my about me is currently blank)


Jul
27
comment Dot Product/ Cross Product Proof
You're using the same $\theta$ for everything. That's not correct.
Jul
21
comment How can the graph of a complex function be embedded in three dimensional space?
@JoeHobbit: What do you mean? Could you give an example?
Jul
18
comment is this the right truth table?
Small nitpick: the fifth row is correct too.
Jul
14
comment Unique root to a function
Words?${}{}{}{}{}{}$
Jul
9
comment Evaluate $\int \limits_{0}^{\infty} \frac{x}{1+x^2} dx$
If you could overcome lack of convergence, no one would bother with convergence tests.
Jul
8
comment incorrect notation in math?
Isn't it $-3/2$ in the exponent?
Jul
8
comment incorrect notation in math?
All those notation are correct, if a bit confusing. But there exist incorrect notations, of course.
Jul
7
comment Complex integral $\frac {1}{1+z}$
I'm not sure I understand what path you're supposed to integrate on.
Jul
4
comment Proving the Product Rule for exponents with the same base
How do you define this when $b$ and $c$ are not rational?
Jul
3
comment derivative of $f(x)=\frac{x}{x-1}$
Do you know how to use the quotient rule? What are you having trouble with specifically?
Jul
1
comment Evaluation of $\sum_{n=1}^{\infty}\frac{2n-1}{2^n}$
That was meant for the asker, by the way.
Jul
1
comment Evaluation of $\sum_{n=1}^{\infty}\frac{2n-1}{2^n}$
Also don't forget that these formulas work when $n \ge 0$, but the series in the question has $n \ge 1$.
Jun
30
comment Confusion regarding change of variables in ODEs
It seems I just can't write comments today. I meant $g(x) = y(x+\pi)$.
Jun
30
comment Confusion regarding change of variables in ODEs
@Shuhaho: I'm sorry, I accidentally submitted that comment early and was going to fix it but I forgot. I understand that. What I was going to say is, what's the point of using a different variable name? Like you said; isn't it clearer to say "use $g(x) = g(x+\pi)$" instead of "use $t = x - \pi$"?
Jun
30
comment Confusion regarding change of variables in ODEs
That works. But what's the point then ofusing two different
Jun
23
comment Prove $\frac{\cos^2 A}{1 - \sin A} = 1 + \sin A$ by the Pythagorean theorem.
Do you know the identity $\cos^2 A + \sin^2 A = 1$?
Jun
21
comment How to derive compositions of trigonometric and inverse trigonometric functions?
@GitGud: Why shouldn't drawings count as proof? As long as you remember that the proof only works for angles smaller than $90^\circ$, they're perfectly good arguments.
Jun
21
comment Equivalence of Notation for Momentum Continuum
That it is an abuse of notation doesn't mean it's wrong. That's why it's called abuse and not misuse.
Jun
17
comment Differentiability of a function at a point to prove it differentiable everywhere on the given condition.
Consider the function that is $1$ at $0$ and $0$ everywhere else.
Jun
17
comment Why does derivation use lim? Alternative method possible!
What do you mean by relativity?