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May
18
revised Calculus differentiation
added 3 characters in body
May
18
answered What does “$\mathbb{1}$” mean in this document?
May
7
answered Precalculus Vector Geometry
May
7
revised Precalculus Vector Geometry
deleted 2 characters in body
May
7
answered Expected value of finding the second ball drawn question
May
7
answered Find an equivalent formula for the sum = 2+4+6+…+2n?
May
6
comment If I know $AB$, how can I calculate $BA$?
Easier question, some ideas for a general answer: math.stackexchange.com/q/731349/16192
May
6
comment If I know $AB$, how can I calculate $BA$?
@José you will have 12 variables and 9 constraints for the system of equations
May
6
comment Sigma algebra generated by a quadratic function
I vaguely recall it is sufficient to represent all open intervals.
Apr
29
comment Biased Asymmetric Random Walk
not clear you can reuse the same result. This walk is biased, so larger p means you will have drift; also skipping one may be a problem -- i.e. you can reach -1, and then skip over to 1 if $n<0$.
Apr
29
answered $\int_{-1}^1 \int_{-1}^1 \sqrt{\frac{1+x-y-xy}{1-x+y-xy}} \, dx\,dy $
Apr
29
comment $\int_{-1}^1 \int_{-1}^1 \sqrt{\frac{1+x-y-xy}{1-x+y-xy}} \, dx\,dy $
This is equivalent to $$\iint_{[-1,1]^2} \sqrt{\frac{(1+x)(1-y)}{(1-x)(1+y)}} dxdy$$, and the latter integral clearly has issues at $x=1$ and $y=-1$ -- are you sure it exists?
Apr
29
revised $\int_{-1}^1 \int_{-1}^1 \sqrt{\frac{1+x-y-xy}{1-x+y-xy}} \, dx\,dy $
deleted 37 characters in body
Apr
29
reviewed Approve Modulo arithmetic question
Apr
28
comment Minimize the norm of $w$.
@user235204 thanks fixed
Apr
28
revised Minimize the norm of $w$.
added 12 characters in body
Apr
28
comment Using equation of a line to find infinitely many different solutions of $ x^2 - 2y^2 = 1$
I don't understand. How do you know that you will get infinitely many integer solutions?
Apr
28
answered Determining $\dim V$
Apr
28
comment Solving Integral that includes radical expression 2
@Zach466920 i am not arguing -- just posting here for intuition builder
Apr
28
comment Solving Integral that includes radical expression 2
wolframalpha.com/input/?i=integrate+sqrt%7Bt%5E4-c%7D+dt