$\begin{cases}
f(1)=-71
\\\\
f(n)=f(n-1)\cdot 4.2
\end{cases}$
**Find an explicit formula for $f(n)$.**
$f(n)=$ [[☃ expression 1]]
Learn To Be brings free online tutoring students around the United States. Volunteer and gain community service hours while helping students who need it./p>