Question

Which of the following is an equivalent expression to 81−12
?(1 point)
Responses

−81−−√

negative Start Root 81 End Root

81−−√

Start Root 81 End Root

−181√

negative Start Fraction 1 over Start Root 81 End Root End Fraction

181√

Answer 1

Interpreting 81−12 as 81^(−1/2):

81^(−1/2) = (81^(1/2))^(−1) = 1/√81 = 1/9.

So the correct choice is the option 1/√81 (which equals 1/9).