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age 14
visits member for 1 years, 10 months
seen 11 hours ago

I'm a perfect example of a n00b.


Apr
17
comment Trigonometric substitution
Oh, x^2/2 is the angle. OK.
Apr
17
comment Trigonometric substitution
did you mean $\frac{\sin^2(x)}2 = \frac{1}{2}(1 - \cos^2(x))$
Apr
10
comment Proof of a claim on a continuous function in [0,1]
Brian... ${}{}{}$
Mar
1
comment What should be added to $x^4 + 2x^3 - 2x^2 + x - 1$ to make it exactly divisible by $x^2 + 2x - 3$?
@HenningMakholm I'm a ninth grader from the same country as Mayank is, and we are taught polynomial division in the ninth grade.
Feb
3
comment Pre-Calculus Vector Problem.
Hello! If you are reading my answer, please note that I posted it a little late. The problem has already been solved, but I just wanted to add my two cents here.
Feb
3
comment Formula help with this equation
@Mico: Yes, that is correct! Still, might be useful to point out.
Feb
3
comment Formula help with this equation
OP may have meant $(x - 1)^3$. Writing $(x - 1)3$ instead of $3(x - 1)$ is at least not used widely.
Jun
3
comment Solving a algebraic equation
This is the best solution, IMO.
Jun
1
comment Why dividing by zero still works
@DavidDyer Remainder and factor theorem: I am just in 9th grade.
Jun
1
comment Why dividing by zero still works
@J.M. Surprisingly, that is exactly what he also said.
Jun
1
comment Why dividing by zero still works
Oh, that makes sense. Thanks!
May
26
comment Proving that either $2^n-1 $ or $ 2^n+1$ is not prime
Why are you not using \rm for variables today?
May
26
comment How to prove $\sum\limits_{n=1}^{\infty}\frac{\sin n}n=\frac{\pi-1}{2}$
That, my friend, is an epic observation. :-)
May
25
comment Algebra Equation with equals on left hand side
@amWhy Just saying, but some people who have started with algebra-precalculus may not understand what a relation is, let alone a symmetric relation. I think you should include a link which explains equivalence in classical logic as well as relations. Thanks :-)
May
24
comment How do you define definition symbol :=?
:= := :=, if you know what I mean. ;-)
May
24
comment What is $-i$ exactly?
@AdrianPetrescu but 1 does have a sign, which is +, so we can use - to negate it. Here, I first focus on how -i cannot exist and then I say that even if it does, what differences are there between the two?
May
23
comment How to show $x^4 - 1296 = (x^3-6x^2+36x-216)(x+6)$
I agree. :-) ${}$
May
23
comment How to show $x^4 - 1296 = (x^3-6x^2+36x-216)(x+6)$
(Mostly known as the synthetic division.)
May
23
comment How to show $x^4 - 1296 = (x^3-6x^2+36x-216)(x+6)$
Uh, actually I am saying that you wrote $a^4 - b^4 = a^3 + a^2 b + ab^2 + b^3$. It should be $a^4 - b^4 = (a - b)(a^3 + a^2 b + ab^2 + b^3)$
May
23
comment How to show $x^4 - 1296 = (x^3-6x^2+36x-216)(x+6)$
$a^4 - b^4 = (a - b)(a^3 + a^2 b + ab^2 + b^3)$...