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September 30, 2014

September 30, 2014

Posted by **roy** on Thursday, April 8, 2010 at 9:07pm.

- advanced algebra -
**Reiny**, Thursday, April 8, 2010 at 9:45pmx^-4/5=16

x^4/5=1/16

(x^4/5)^(5/4) = (1/16)^(5/4)

x = 1/32

your second is ambiguous

the terms are

(1/z)^a , z^a, z^(1/a) and (1/z)^(1/8)

it depends on the value of z

e.g. if z = 1, all terms have the same value

if z>1

investigate:

let z = 4, a = .2

(1/4)^.2 = .758

4^.2 = 1.32

4^(1/.2) = 1024

(1/4)^(1/8) = .84

arrange the terms according to the answers

now what about 0< z < 1

repeat my method and decide for that case

if z < 0 , that is if z is negative you will run into all kinds of undefined situations when you take roots.

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