Question

Calculati;
1. ( 2 supra 3) la -1
2. ( 2supra 3) la -2
3. (-1 supra 3 ) la -2
4. (-1 supra 3 ) la -3

Answer 1

1. $(\frac{2}{3}) ^{-1} = \frac{3}{2} = 1,5$
2. $( \frac{2}{3} )^{-2} = (\frac{3}{2}) ^{2} = \frac{ 3^{2} }{2 ^{2} } = \frac{9}{4}=2,25$
3. $( \frac{-1}{3} )^{-2} = ( \frac{3}{-1} )^{2} = \frac{9}{1} =9$
4.$( \frac{-1}{3} )^{-3} = ( \frac{3}{-1} )^{3} = \frac{27}{-1} =-17$