Question

a) (-5) elevado -3 =
b) ( -1) elevado a -4 =
c) (-1)-5 =
d) (-8)-3=
e) (3/7) elevado a -2
f) (2/5) elevado a -1
g) (1/3)-3
h) (-1/3) -2
i) (-2/5) -3

2) resolva as potências

a) (-4) elevado a -2
b) (+3) elevado a 3
c) ( -2/7) 2
d)(+3/4) -4
e)(+1/5) 5
f) (-12/13) 1
g) (+5/9) -2
h) (+2/7) 4

Answer 1

expoente negativo pegamos a invesa do número.

1-
a)-5^-3 = (-1/5)^3 = -1/125
b)-1^-4 = 1
c)-1^-5 = -1
d)-8^-3 = (-1/8)^3 = -1/512
e)(3/7)^-2 = (7/3)^2 = 49/9
f)(2/5)^-1 = 5/2
g)(1/3)^-1 = 3^3 = 27
h)(-1/3)^-2 = (-3)^2 = 9
i)(-2/5)^-3 = (-5/2)^-3 = (-2/5)^3 = 8/125


2-
a)-4^-2 = (-$\frac{1}{4}$)^2 
Logo: $\frac{1}{16}$)
b)3^3 = 9
c)(-2/7)^2 = -4/49
d)(3/4)^-4 = (4/3)^4 = 236/81
e)(1/5)^5 = 1/3125
f)(-12/13)^1 = (-12/13
g)(5/9)^-2 = (9/5)^2 = 81/25
h)(-1/3)^-2 = (-3)2 = 9