Question

Aplique as propriedades de potencia e simplifique as expressoes:
A) 7^9.7^-6
B) (8:3)^-2
C) (3:8)^-2
D) (6^-2:5)^-2
E) (7^-1.2^-1)^-3

Answer 1

a) mesma base, some os expoentes
7^3

b)expoente negativo- inverte a fração
(8/3)^-2=(3/8)^2=
9/64

c)mesma situação anterior
64/9

d)(36/5)^2=36^2/25=
1296/25

e)(7.2)^-3=14^-3= 1/14^3=1/2744

Answer 2

Olá,

a)

7⁹·7⁻⁶ = 7⁹⁻⁶ = 7³

b)

(8/3)⁻² = (3/8)² = 3²/8² = 9/64

c)

(3/8)⁻² = (8/3)² = 8²/3² = 64/9

d)

(6^(-2/5))^-2 = (6)^(4/5) = ⁵√6⁴

e)