Question

Can someone help with 9 please

Answer 1

Exponent rules tell us that
`a^{(b^(c))}=a^(bc)` thus:

`(5^(-2)a^(3)b^(-4))^(-1) = 5^(2)a^(-3)b^(4)`
Which can be re-written in simplified form as:

`(25b^(4))/(a^(3))`