bntuin ya... ribet ni..

Penyelesaian:

7. [tex]( \frac{4a^-4}{b^2})^-1/2[/tex]
= [tex]( \frac{2^2 . a^-4}{b^2})^-1/2 [/tex]
= [tex] \frac{2^-1 . a^2}{b^-1} [/tex]
= 1/2(a²b)  (D).

8. ([tex] \frac{8p^-9 . q^-2}{64p^-6 . q})^-1 [/tex]
= ([tex] \frac{p^-9 q^-2}{8p^-6 . q})^-1 [/tex]
= ([tex] \frac{p^-3 . q^-3}{8})^-1 [/tex]
= ([tex] \frac{1}{2^3 . p^3 . q^3})^-1 [/tex]
= 2pq^-3  (E).