Answer :
Remember these:
[tex]\left(\dfrac{a}{b}\right)^{-c}=\left(\dfrac{b}{a}\right)^{c}\\\\ a^0=1[/tex]
[tex]\left(\dfrac{a}{b}\right)^{-c}=\left(\dfrac{b}{a}\right)^{c}\\\\ a^0=1[/tex]
