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 Yearling
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Apr
19
comment Can I take ln(y) in sequences/series?
The statement after your first arrow doesn't follow from the previous statements....
Dec
7
comment Explicit formula for quadratic recurrence
This may be of interest: mathworld.wolfram.com/QuadraticMap.html.
Nov
11
revised Let $(G, *)$ be a group and let $\{g,h\}$ be a subset of $G$. Prove that $(g*h)^{-1}=h^{-1}*g^{-1 }$.
Improved formatting
Nov
11
suggested approved edit on Let $(G, *)$ be a group and let $\{g,h\}$ be a subset of $G$. Prove that $(g*h)^{-1}=h^{-1}*g^{-1 }$.
Oct
7
comment Prove with Euclid's Algortihm
@KFC Note that the last nonzero remainder is 1, implying that $\gcd(mk-1, m)=1$.
Oct
7
answered Prove with Euclid's Algortihm
Oct
7
answered Value of acceleration vector at maximum speed.
Oct
7
revised Why $\cos(4\cos^{-1}(\frac{x}{2})) = \frac{x^4}{2} -2x^2+1$ $?$
Added detail.
Oct
7
answered Why $\cos(4\cos^{-1}(\frac{x}{2})) = \frac{x^4}{2} -2x^2+1$ $?$
Oct
7
comment Find a basis for a solution set of a linear system
@user124384 I'm not sure in what sense you are using the term 'equivalent,' but, in general, one can scale the elements of any basis by any nonzero scalar to obtain a different basis.
Oct
2
awarded  Yearling
Aug
7
comment $\alpha''(t)=0$ what can we say about $\alpha$
The curve $\alpha$ will be a line.
Feb
17
revised How do I integrate an expression of the form $(x + c)^n dx$?
Improved formatting.
Feb
17
suggested approved edit on How do I integrate an expression of the form $(x + c)^n dx$?
Feb
17
comment How do I integrate an expression of the form $(x + c)^n dx$?
Do a $u$-substitution for $x+100$.
Dec
20
comment Subspaces of vector space and their spans
Ah, ok. Then, by the definition of subspace, the span of a subspace is just that subspace.
Dec
17
revised Connectedness proof
Corrected spelling
Dec
17
suggested approved edit on Connectedness proof
Dec
17
awarded  Caucus
Dec
10
awarded  Popular Question