Question

4^-5/2

Answer 1

http://www.wolframalpha.com/ use this website. very helpful

Answer 2

http://www.wolframalpha.com/input/?i=4%5E-5%2F2 your answer.

Answer 3

2^-5

Answer 4

Make it a positive power by putting 4^{-5/2} under 1.\[\large \frac{1}{4^{5/2}}\]\[\large 4^{5/2} = \sqrt{4^5} = 32\]\[\large \frac{1}{4^{5/2}}=\frac{1}{32}\]

Answer 5

4^-5/2= 2^2^-5/2=2^-10/2=2^-5=1/32