Răspuns:
a)
[tex][-0,(3)]^{-2} = [-\frac{3}{9}]^{-2} = (-\frac{1}{3})^{-2} =\frac{1}{(-\frac{1}{3})^{2}}=\frac{1}{\frac{1}{9}} = 1* \frac{9}{1} = \boxed{9}[/tex]
b)
[tex]3^{-2}=\frac{1}{3^{2} } = \boxed{\frac{1}{9} }[/tex]
c)
[tex](\frac{2}{3})^{-2} =\frac{1}{(\frac{2}{3})^{2}} = \frac{1}{\frac{4}{9}}} = 1 * \frac{9}{4} =\boxed{\frac{9}{4} }[/tex]
d)
[tex](-0,25)^{-1} = \frac{1}{-0,25} = \boxed{-\frac{1}{0,25}}[/tex]
e)
[tex](0,1)^{-3} = \frac{1}{(0,1)^{3}} = \boxed{\frac{1}{0,001} }[/tex]
f)
[tex](-\frac{1}{2} )^{-2} = \frac{1}{(-\frac{1}{2} )^{2}} = \frac{1}{\frac{1}{4}} = 1 * \frac{4}{1} = \boxed{4}[/tex]
