Question

Which expression is equivalent to 9^-2? –81 –18 1/81 1/18

Answer 1

Answer:

(C) $f(x)={\frac{1}{81}}$

Step-by-step explanation:

The given expression is:

$f(x)=9^-2$

Upon solving the above expression, which can be written as:

$f(x)=({\frac{1}{9}})^2$

$f(x)={\frac{1}{81}}$

which is same as the expression given in the option (C) that is $f(x)={\frac{1}{81}}$, hence the option C is correct.

Answer 2

(9)^-2 = (1/9)^2 = 1/81