Question

Helpp plsss and thank youu

Answer 1

answer : option C

`(4r^(-2)st^4)^2(r^(-4)st^6)^(-2)`

Multiply the exponent -2 inside the parenthesis

`(4^2r^(-4)s^2t^8)(r^(8)s^(-2)t^(-12))`

When we multiply same terms we add the exponents

`(4^2r^(-4+8)s^(2-2)t^(8-12))`

`(4^2r^(4)s^(0)t^(-4))`

Now make the exponent positive

`(16r^4)/(t^4)`