Question $21$

Evaluate the limit$.$

$\underset{t-3\frac{}{2}}{lim}=(2costi+5sintj)$

$-5j$

$5$j

$2$ i $-5j$

$2$i

Question $38$

Find the domain of the vector$-$valued function.

$r(t)=sin4ti+e^{\sqrt[\phantom{2}]{t}}j$

All real numbers

$t\frac{1}{4}$

$t>4$

$t0$