Question

Agora, calcule as potências a seguir.

a) (−3)^2
b) −3^2
c) (−1/2)^3
d) – (1/2)^3
e) (−0,8)^4
f) −0,8^4

Answer 1

a) (−3)² = (-3) . (-3) = 9

b) −3² = - (3²) = -9

c) (−1/2)² = (-1/2) . (-1/2) = 1/4

d) – (1/2)³ = - (1/8) = -1/8

e) (−0,8)³ = (-0,8) . (-0,8) = 0,64

f) −0,8³ = - (0,8³) = -0,512

Answer 2

Oie, Td Bom?!

a)

$( - 3) {}^{2} = 3 {}^{2} = 3 \: . \: 3 = 9$

b)

$- 3 {}^{2} = - 3 \: . \: 3 = - 9$

c)

$( - \frac{1}{2} ) {}^{3} = - ( \frac{1}{2} ) {}^{3} = - \frac{1 {}^{3} }{2 {}^{3} } = - \frac{1}{8}$

d)

$- ( \frac{1}{2} ) {}^{3} = - \frac{1 {}^{3} }{2 {}^{3} } = - \frac{1}{8}$

e)

$( - 0,8) {}^{4} = 0,8 {}^{4} = 0,8 \: . \: 0,8 \: . \: 0,8 \: . \: 0,8 = 0,4096$

f)

$- 0,8 {}^{4} = - 0,8 \: . \: 0,8 \: . \: 0,8 \: . \: 0,8 = - 0,4096$

Att. Makaveli1996