# Section 1.2

**1.****(a)**T**(b)**F**(c)**F**(d)**F**(e)**T**(f)**F**(g)**F**(h)**F**(i)**T**(j)**T**(k)**T

**3.**${M}_{13}=3,\text{}{M}_{21}=4,$ and ${M}_{22}=5$**4.****(a)**$\left(\begin{array}{rrr}6& 3& 2\\ -4& 3& 9\end{array}\right)$**(c)**$\left(\begin{array}{rrr}8& 20& -12\\ 4& 0& 28\end{array}\right)$**(e)**$2{x}^{4}+{x}^{3}+2{x}^{2}-2x+10$**(g)**$10{x}^{7}-30{x}^{4}+40{x}^{2}-15x$

**13.**No, (VS 4) fails.**14.**Yes**15.**No**17.**No, (VS 5) fails.**22.**${2}^{mn}$