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• 7 Prove that $A^2=\text{tr}(A)A$ where $A$ is $n\times n$ matrix of rank $1$
• 6 Prove that a recurrent sequence $u_n$ is convergent if $\lim \limits_{n \to \infty}(u_{n+1}-u_n)=0$
• 5 Let $A\in \mathbb{R}^{3\times 3} $ such that: ...
• 5 $cos(ax)=a\cdot cos(x)$ Which are all the values of $a$?
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