Question

I need help
b^-3= 1/216
can someone teach me to answer this?

Answer 1

well you need to know about negative powers...

\[a^{-b} = \frac{1}{a^b}\]

so in your question its

\[\frac{1}{b^3} = \frac{1}{216}\]

if you cross multiply, or take the reciprocals of each fraction you'll be able to solve for b.

hope it helps

Answer 2

1/(6^3) = 1/216

Answer 3

thankyou guys so much :}