Question

Calcule o valor das expressoes:

a) (-3)^-1 + (-1)^-3 =

b)2^-4 - 2² =

c)2° + (-2)^4 . 4^-2 - (-2)³ =

Answer 1

Calcule o valor das expressoes:

a) (-3)^-1 + (-1)^-3 =
- 1/3 - 1
- 1/3 -1
-4/3

b)2^-4 - 2² = 
1/16 -4
-63/16

c)2° + (-2)^4 . 4^-2 - (-2)³ =
1 +16 . 1/16 + 8
1 + 1 + 8
10

Answer 2

$a) (-3)^{-1} + (-1)^{-3} =\\ \\ \frac{1}{-3}+\frac{1}{(-1)^3}\\ \\ -\frac{1}{3}+\frac{1}{-1}\\ \\ \boxed{-\frac{1}{3}-1=-\frac{4}{3}}\\ \\ \\ b)2^{-4} - 2^2 = \\ \\ \frac{1}{2^4}-4=\\ \\ \frac{1}{16}-4=\boxed{-\frac{63}{16}}$

$c)2^0 + (-2){^4} . 4^{-2} - (-2)^3=\\ \\ 1+16.\frac{1}{16}+8=\\ \\ \boxed{1+1+8=10}$