a) [tex]5^{-3}[/tex] = [tex]\frac{1}{5}^{3}[/tex] = [tex]\frac{1}{125}[/tex]
b) [tex](-2)^{7}[/tex] = -128
c) [tex]3^{-3}[/tex] = [tex]\frac{1}{3}^{3}[/tex] = [tex]\frac{1}{27}[/tex]
d) [tex](2^{3})^{7}[/tex] = [tex]2^{21}[/tex] = 2.097.152
e) [tex]10^{3}[/tex] = 1000
f) [tex]18^{1}[/tex] = 18
g) [tex]-3^{2}[/tex] = -9
h) [tex](\frac{7}{2}) ^{-4}[/tex] = [tex]\frac{2}{7}^{4}[/tex] = [tex]\frac{16}{2401}[/tex]
Espero ter ajudado :D
