c) la impartirea puterilor cu aceeasi baza exponentii se scad deci, raspunsul este
[tex]( \frac{7}{11})^1= \frac{7}{11} [/tex]
d)[tex] (\frac{-3}{7})^2= \frac{9}{49} [/tex]
e)[([tex] \frac{1}{2})^2]^-3=( \frac{1}{2})^-6 [/tex]
f)[tex] (\frac{1}{3} ^{-1}) ^{-2} =( \frac{1}{3})^2= \frac{1}{9} [/tex]
