Question

Could you help on this one? I'm confused. I think u = 1/2 but I'm not sure.
http://prntscr.com/5f971o

Answer 1

@SolomonZelman @iGreen

Answer 2

it is not 1/2

Answer 3

\(\large\color{black}{ a^{-b}=\frac{1}{a^b} }\) apply this to, \(\large\color{black}{ u^{-3} }\)

Answer 4

and then you know that, \(\large\color{black}{ 5^{3}=125 }\) .

Answer 5

Thankss(:

Answer 6

yw:)