Let A=begin{bmatrix}2 & -1&5 -3 & 4&0 end{bmatrix} text{ and } B=begin{bmatrix}-3 & -4&2 -1 & 0&-5 end{bmatrix} Find each result. 3A+2B=? A-3B=?

Describe all solutions of Ax=0 in parametric vector form, where A is row equivalent to the given matrix
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b) ${\displaystyle f\left(n\right)=\sqrt{n^2+1}}$. 
c) ${\displaystyle f\left(n\right)=\frac{1}{n^2-4}}$.

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