# Παρθ Κοχλι

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bio website location age 14 member for 1 year, 5 months seen Dec 14 at 6:15 profile views 1,152

I'm a perfect example of a n00b.

# 489 Actions

 May26 comment Proving that either $2^n-1$ or $2^n+1$ is not prime Why are you not using \rm for variables today? May26 comment How to prove $\sum\limits_{n=1}^{\infty}\frac{\sin n}n=\frac{\pi-1}{2}$ That, my friend, is an epic observation. :-) May26 accepted What is $-i$ exactly? May25 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 :-) May24 comment How do you define definition symbol :=? := := :=, if you know what I mean. ;-) May24 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? May23 comment How to show $x^4 - 1296 = (x^3-6x^2+36x-216)(x+6)$ I agree. :-) ${}$ May23 comment How to show $x^4 - 1296 = (x^3-6x^2+36x-216)(x+6)$ (Mostly known as the synthetic division.) May23 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 $a^4 - b^4 = (a - b)(a^3 + a^2 b + ab^2 + b^3)$ May23 comment How to show $x^4 - 1296 = (x^3-6x^2+36x-216)(x+6)$ $a^4 - b^4 = (a - b)(a^3 + a^2 b + ab^2 + b^3)$... May23 comment How to show $x^4 - 1296 = (x^3-6x^2+36x-216)(x+6)$ Note that the factorization is easily derivable by the Factor Theorem. May23 answered How to show $x^4 - 1296 = (x^3-6x^2+36x-216)(x+6)$ May22 comment Choice of numbers in calculating $\lim_{x\rightarrow 0}\frac{e^{2x}-1}{\sin 3x}$ I think what lab said suffices. May21 awarded Good Question May21 revised Basic Trigonometric Substitution Question corrected minor spelling mistake May21 revised Determine the inverse function of $f(x)=3^{x-1}-2$ added 39 characters in body May21 answered Determine the inverse function of $f(x)=3^{x-1}-2$ May21 comment The sum of irrationals is irrational? @user17762 And there's a populist badge for ya. May20 revised Given $x,y,z\geq0$ and $x^2+y^2+z^2+x+2y+3z=13/4$. Find the minimum of $x+y+z$. edited >= to ge symbol May20 comment Why is 987654321/123456789 = 8.0000000729? Ah, gotcha. Nice answer.