Question

How do i do this?

Simplify using only positive exponents:

(81/64)^ -1/2

Answer 1

81 ^-1/2 = 1/9
1/64 ^ -1/2 = 1/1/8 = 8
answer is 8/9

Answer 2

or (81/64)^ -1/2 = (64/81)^ 1/2
= 64^1/2 / 81^1/2 = 8/9

Answer 3

\[1/\sqrt{(81/64)}\]

\[1/(9/8)\]

8/9

Answer 4

yes 8/9 is right

Answer 5

hm..is it 5^x = 125?