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visits member for 4 years, 4 months
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Don't have much time these days...


Nov
5
comment Solving the equation $-2x^3 +10x^2 -17x +8=(2x^2)(5x -x^3)^{1/3}$
Are you sure? If x and y are real, then x^3 = y^3 implies x = y.
Nov
4
revised Solving the equation $-2x^3 +10x^2 -17x +8=(2x^2)(5x -x^3)^{1/3}$
deleted 1 characters in body
Nov
4
comment Solving the equation $-2x^3 +10x^2 -17x +8=(2x^2)(5x -x^3)^{1/3}$
@tom: btw, I added an answer which uses only simple algebra tricks, assuming we are looking only for real roots.
Nov
4
answered Solving the equation $-2x^3 +10x^2 -17x +8=(2x^2)(5x -x^3)^{1/3}$
Nov
4
comment Solving the equation $-2x^3 +10x^2 -17x +8=(2x^2)(5x -x^3)^{1/3}$
I don't, unfortunately. It might help others though.
Nov
4
comment Solving the equation $-2x^3 +10x^2 -17x +8=(2x^2)(5x -x^3)^{1/3}$
Which forum did you find it in? Perhaps a link?
Nov
4
comment Solving the equation $-2x^3 +10x^2 -17x +8=(2x^2)(5x -x^3)^{1/3}$
I am curious. How did you come across this equation?
Nov
4
answered Solving this set of quadratic equations
Nov
4
comment Evaluating the integral $\int_{0}^{\infty} \Bigl\lfloor{\frac{n}{e^{x}}\Bigr\rfloor} \ dx $
+1: I have deleted my answer which said something similar. Welcome to the site chroma :-)
Nov
4
comment Help inequality involving exponential function
Where did you get stuck exactly? Also, if this is homework, please consider tagging it as homework.
Nov
4
comment A conjecture of parallelogram inside convex and central symmetric curve
Also, if you could edit the question with a brief sketch of proof of the 4/(4+pi) bound, it might help others modify it to give better bounds.
Nov
4
revised A conjecture of parallelogram inside convex and central symmetric curve
tex; deleted 1 characters in body; added 32 characters in body
Nov
4
comment Why does the polynomial equation $1 + x + x^2 + \cdots + x^n = S$ have at most two solutions in $x$?
Yes, you are right.
Nov
4
comment Why does the polynomial equation $1 + x + x^2 + \cdots + x^n = S$ have at most two solutions in $x$?
@Rahul: No worries, you don't have to apologize :-)
Nov
4
comment Why does the polynomial equation $1 + x + x^2 + \cdots + x^n = S$ have at most two solutions in $x$?
+1: But you are probably missing the case when $S=n+1$.
Nov
4
revised Continued Fraction expansion of $tan(1)$
use \cfrac
Nov
3
revised Continued Fraction expansion of $tan(1)$
added 13 characters in body
Nov
3
comment Why does the polynomial equation $1 + x + x^2 + \cdots + x^n = S$ have at most two solutions in $x$?
@Willie: The derivative is particularly nice and trying to visualize the graph is always intuitive :-)
Nov
3
comment Why does the polynomial equation $1 + x + x^2 + \cdots + x^n = S$ have at most two solutions in $x$?
@Rahul: You are right. I have edited it.
Nov
3
revised Why does the polynomial equation $1 + x + x^2 + \cdots + x^n = S$ have at most two solutions in $x$?
added 47 characters in body; added 47 characters in body