For this case we have the following expression:
[tex]\frac {1} {3^ {- 2} * x^{ - 4} * y ^ 2}[/tex]
We must evaluate the expression to:
[tex]x = 3\\y = -1[/tex]
So:
[tex]\frac {1} {3^{- 2} * 3^{ - 4} * (- 1) ^ 2} =[/tex]
[tex]\frac {1} {\frac {1} {3 ^ 2} * \frac {1} {3 ^ 4} * 1} =\\\frac {1} {\frac {1} {3 ^ 2} * \frac {1} {3 ^ 4}} =\\\frac {1} {\frac {1} {9} * \frac {1} {81}} =\\\frac {1} {\frac {1} {729}} =\\\frac {729} {1} =\\729[/tex]
Answer:
Option B
