Question

calculati
3 la puterea -4 asupra 3 la puterea -7

Answer 1

$\frac{3^{-4}}{3^{-7}}=3^{-4}:3^{-7}=3^{-4-(-7)}=3^{-4+7}=3^3=27$

PS: Utilizam regula de calcul cu puteri:

$a^b:a^c=a^{b-c}$