Mathematics
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Hamid Reza Ebrahimi
  • Member for 6 years, 10 months
  • Last seen more than 1 year ago
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answers
158
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12
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36
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21
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Top posts
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All Questions Answers
Score Newest
question
10
Show that among any consecutive $16$ natural numbers one is coprime to all others
May 11, 2016
question
9
For function $f:[0,1]\rightarrow \Bbb R$ we know : $f(x+y)\geq f(x)+f(y)$.Prove that $f(x)\leq 2x$
Nov 4, 2017
question
9
Verify surjectivity of the function $f$ satisfying: $f(x)+f(x^2)=x$
Jan 1, 2018
question
7
Find all positive integers satisfying: $x^5+y^6=z^7$
Jul 12, 2016
question
6
What's $\alpha+\beta$ if we have: $\alpha^3-6\alpha^2+13\alpha=1$ and $\beta^3-6\beta^2+13\beta=19$ ($\alpha$ and $\beta$ are Real)
Feb 18, 2016
question
6
Find all polynomials with real coefficients $P(x),Q(x)$ such that for every real number $x$ we have: $P(Q(x))=P(x)^{2017}$
Aug 14, 2017
question
5
Find all positive integers $k,m,n$ satisfying: $\frac1k+\frac1m+\frac1n=\frac{1}{1996}$
Jul 11, 2016
question
5
Solve the following nonlinear system of equations:$ xy+xz+yz=12 , xyz=2+x+y+z$
Sep 13, 2017
question
5
Show that $1^7+7^7+13^7+19^7+23^7\equiv{0}\pmod{63}$
Jun 4, 2016
question
5
Find all integer roots of: $x^2(y-1)+y^2(x-1)=1$
Jul 14, 2016
Top Meta posts
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Academic advantages of activity on SE
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Number sets symbols in Mathjax
4
How to archive and backup our questions to our own PC just in case?

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