a:$2{log}_{10}{1}=\frac{1}{2}$
b:$\left|\begin{matrix}5&-3\\2&-1\\\end{matrix}\right|=-11$
c:$ \left|3+2i\right|=\sqrt{13}$ $\left(i=\sqrt{-1}\right)$
d:$\frac{d}{dt}sin{\left(300t+10\right)}=cos{\left(300t+10\right)}$
e:$\int_{0}^{2}{tdt=4}$
1. a b 2. a e 3. b c 4. c d 5. d e