Mathematics
Jean G's user avatar
Jean G's user avatar
Jean G's user avatar
Jean G
  • Member for 10 years, 2 months
  • Last seen more than 1 year ago
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Interested in math & finance.

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All Questions Answers
Score Newest
question
8
Evaluate $\sum\limits_{(m,n) \in D,m < n} \frac{1}{n^2 m^2} $ where $\gcd(m,n)=1$
Jul 25, 2013
answer
4
$1+a$ and $1-a$ in a ring are invertible if $a$ is nilpotent
Jul 24, 2013
answer
3
equation to linear function
Jul 25, 2013
answer
3
Find domain of funcition
Oct 30, 2015
answer
3
Prove that $f$ is injective iff $f(A\cap B)=f(A)\cap f(B)$.
Nov 1, 2015
answer
3
Can an inverse $f^{-1}$ be defined if $f$ is not bijective?
Nov 3, 2016
answer
3
Find the derivative of $f^{-1}(x)$ at $x=2$ if $f(x)=x^2 + x + \ln x$
Dec 6, 2016
answer
2
Finding limit of a sequence in a metric space.
Oct 30, 2015
answer
2
The number of odd coefficients in the expansion of $(x^2+x+1)^n$
Oct 30, 2015
answer
2
If $A$ is open and $A\subset B$, is $B$ open?
Nov 3, 2016
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