Evaluate the following when a=3,b=1/4 , and c=5:
\(\[ \frac{b^{-1}}{ca^{-1} - ac^{-1}}. \]\)
4/(5/3 - 3/5) =
4 / [ ( 25 - 9) / 15 ] =
4 / [ 16 / 15 ] =
4 * 15 / 16 =
60 / 16 =
15 / 4
+43 
