Question

12-calcule as seguintes potências

POR FAVOR ME AJUDE !! :(​

Answer 1

Explicação passo-a-passo:

12.

a) $\sf 5^{-3}=\dfrac{1}{5^3}=\dfrac{1}{125}$

b) $\sf 3^{-2}=\dfrac{1}{3^2}=\dfrac{1}{9}$

c) $\sf \left(\dfrac{3}{4}\right)^{-2}=\left(\dfrac{4}{3}\right)^2=\dfrac{16}{9}$

d) $\sf 2^{-1}=\dfrac{1}{2^1}=\dfrac{1}{2}$

13.

a) $\sf (\sqrt[2]{16})^2=16$

b) $\sf (\sqrt[2]{25})^3=\sqrt[2]{(5^3)^2}=5^3=125$

c) $\sf (\sqrt[2]{81})^3=\sqrt[2]{(9^3)^2}=9^3=729$

d) $\sf (\sqrt[2]{10})^4=10^2=100$

e) $\sf (\sqrt[2]{2})^4=2^2=4$

14.

a) $\sf 3,6\cdot10^4=36000$

b) $\sf 0,025\cdot10^2=2,5$

c) $\sf 0,4\cdot10^{-2}=0,004$

d) $\sf 3576\cdot10^{-3}=3,576$