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9 Showing $64$ divides $5^n-8n^2+4n-1$ without induction Feb 27 '19
8 Compute $\lim_{N\to \infty} A_N$ where $\{A_N\}$ is a sequence of matrices Oct 16 '19
7 Is $x=2,y=13$ the unique solution? Dec 27 '20
5 Alternative approaches to prove the following inequality Jan 23
5 Inverse of Strictly Monotone Function Apr 11 '20
5 Solving the equation $f(x)=f^{-1}(x)$. [duplicate] Apr 27 '19
4 For which $x,y, z$ we have $390=x^3+y^3+z^3$ with $ x, y, z$ integers? Apr 20 '20
4 equation with quadratic power Mar 30 '20
4 Sum to infinity of a Series Feb 20 '19
4 Range of $\frac{\cos\theta_1+\cdots+\cos\theta_{10}}{\sin\theta_1+\cdots+\sin\theta_{10}}$ given $\sin^2\theta_1+\cdots+\sin^2\theta_{10}=1$ Jan 20
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