Reputation
6,836
Top tag
Next privilege 10,000 Rep.
Access moderator tools
Badges
4 21 56
Impact
~229k people reached

Jul
27
comment Mistakes in $\lim_{a\to \infty}(a^2 - a) = - \frac{1}{6}$?
Why do you accept that the sum of the positive integers is $-1/12$?
Jul
27
comment How to show $\sqrt{|x|}$ is not Lipschitz continuous?
Suppose that the derivative IS bounded (by L). Then you can find $x_0$ such that $f'(x_0) \geq L$
Jul
27
reviewed Approve Systems of equations word problem
Jul
27
comment Systems of equations word problem
The amount of gold is $85.93$g. This equals the amount of gold from the first alloy, which is $.77x$, plus the amount from the second alloy, $.96$y.
Jul
26
comment Systems of equations word problem
Well $x + y = 100$, for starters.
Jul
26
comment Finding how much percent passed in both Maths and English
Stop using x! The value of x is $1$ (!) because it is the PROPORTION/PERCENT of students, and that total is 1 (100%).
Jul
26
answered Finding how much percent passed in both Maths and English
Jul
26
comment Finding how much percent passed in both Maths and English
Draw a Venn diagram. Forget the fractions.
Jul
24
comment Why are values greater than $\pi$ radians given as negative in exponential form?
mathworld.wolfram.com/ComplexArgument.html
Jul
21
comment Solving $6 \cos x - 5 \sin x = 8$
The correct problem is revealed
Jul
16
comment Mod question: $-5 \pmod 3$?
$$-5 \equiv 1 \pmod 3$$ because $3|(-5 - 1)$
Jul
13
comment Prove the inequality by induction
The down-votes are probably because we value showing your work more than showing an answer.
Jul
3
comment Question about the existence of points and lines.
If seeing the invisible is a problem for you, maybe math isn't the best course of study.
Jul
2
comment Why is $\max(x, x')$ equivalent to $\frac{1}{2}( x + x' + |x - x' |)$?
Doubtful, but I can bump you back up.
Jun
10
comment Fano plane line
This is fascinating! Do you have any recommendation for (undergrad-) accessible material on this or related topics?
Jun
10
comment Intuitive Understanding of the constant “$e$”
@MarianoSuárez-Alvarez - I think I get it now! Will leave the answer, for posterity's sake :)
Jun
9
awarded  Popular Question
Jun
3
comment What are the dimensions of the region that minimizes the quantity of fence?
I left off a "y" - too many questions about using a barn or a river on one side!
Jun
3
revised What are the dimensions of the region that minimizes the quantity of fence?
typo!
Jun
3
comment How to find the square root of $11-6\sqrt{2}$?
Silly question - why do you say subtracting out the square root of the norm, but then (just) add it? If the norm is $49$, why not just say "add $7 = \sqrt{49}$"?