Question

Aplique as propriedades

a) 7^X.7^X-2

b) 3^2:3^-5

Answer 1

a)

$7 {}^{x} \times 7 {}^{x - 2} = 7 {}^{x + (x - 2)} = 7 {}^{x + x - 2} =7 {}^{2x - 2}$

b)

$3 {}^{2} \div 3 {}^{ - 5} = 3 {}^{2 - ( - 5)} = 3 {}^{2 + 5} = 3 {}^{7}$