#### Answer

$e^{-4t}$

#### Work Step by Step

$W(e^{-2t},te^{-2t}) = |\begin{matrix}
e^{-2t} & te^{-2t}\\
-2e^{-2t} & e^{-2t}(1-2t)\\
\end{matrix}| = e^{-4t}-2te^{-4t}-(-2te^{-4t}) = e^{-4t}$

Published by
Wiley

ISBN 10:
0-47038-334-8

ISBN 13:
978-0-47038-334-6

$e^{-4t}$

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