Question

5. Calcule o valor de cada uma das seguin- tes potências: 1 -3 a) (9 5 2 2. 2) c) d ) -2 -2 b) 5 8​

Answer 1

a)

( \frac{2}{1}) {}^{1} = \frac{2}{1}(12)1=12

b)

(\frac{5}{1} ) {}^{2} = \frac{5}{1} \times \frac{5}{1} = \frac{25}{1}(15)2=15×15=125

c)

( - \frac{2}{5} ) ^{3} = ( - \frac{2}{5} ) \times ( - \frac{2}{5} ) \times ( - \frac{2}{5} ) = \frac{8}{125}(−52)3=(−52)×(−52)×(−52)=1258

d)

( - \frac{8}{1} ) {}^{2} = ( - \frac{8}{1} ) \times ( - \frac{8}{1} ) = \frac{64}{1}(−18)2=(−18)×(−18)=164