Question

How do i evaluate the expression (16/81)with the exponent of -3/4?

Answer 1

flip the fraction to get a positive exponent first

Answer 2

how so?

Answer 3

lets look at this one step at a time.

first, do you know what this equals?\[x^{-1}=?\]

Answer 4

uhh no sorry

Answer 5

o wait it equals 1 right?

Answer 6

no.

ok, I guess you first need to brush up on the various laws of indices before you can tackle this type of problem.

here is a good site that might help you understand this better: http://www.mathsisfun.com/exponent.html