Question

Alguém pode me ajudar ?????

Answer 1

i) $\frac{3^5:3^{-9}}{3^{-5}} = \frac{3^{5+9}}{3^{-5}} = \frac{3^{14}}{3^{-5}} = 3^{14+5} = 3^{19}$

j) $\frac{(3^5-3^9)}{3^5} = \frac{3^5(1-3^4)}{3^5} = 1 - 3^4 = 1 - 81 = -80$

k) $\frac{3^5\times3^{-9}}{3^{-5}} = \frac{3^{5-9}}{3^{-5}} = \frac{3^{-4}}{3^{-5}} = 3^{-4+5} = 3^1 = 3$