Question

Calcule:
Explique bem os cálculos por favor ...​

Answer 1

Explicação passo-a-passo:

.

$( \dfrac{4}{5} ) {}^{2}$

$\dfrac{16}{25}$

.

$\dfrac{4 {}^{2} }{5}$

$\dfrac{16}{5}$

.

$( - \dfrac{3}{10} ) {}^{2}$

$\dfrac{9}{100}$

.

$( - \dfrac{9}{8} ) {}^{2}$

$\dfrac{81}{64}$

.

$( - \dfrac{1}{2} ) {}^{5}$

$- \dfrac{1}{32}$

.

$( - \dfrac{1}{2} ) {}^{6}$

$\dfrac{1}{64}$

.

$7 {}^{ - 2}$

$\dfrac{1}{7 {}^{2} }$

$\dfrac{1}{49}$

.

$( \dfrac{5}{7} ) {}^{ - 2}$

$( \dfrac{7}{5} ) {}^{2}$

$\dfrac{49}{25}$

.

$( \dfrac{2}{3} ) {}^{ - 4}$

$( \dfrac{3}{2} ) {}^{4}$

$\dfrac{81}{16}$

.

$( \dfrac{2}{5} ) {}^{ - 3}$

$( \dfrac{5}{2} ) {}^{3}$

$\dfrac{125}{8}$

.

$( \dfrac{6}{3} ) {}^{ - 1}$

$2 {}^{ - 1}$

$\dfrac{1}{2}$

.

$5 {}^{ - 3}$

$\dfrac{1}{5 {}^{3} }$

$\dfrac{1}{125}$

Answer 2

Explicação passo-a-passo:

a) (4/5)²=4/5.4/5=16/25

b)4²/5=(4x4)/5=16/5

c)(3/10)²=3/10x3/10=9/100

d)(-9/8)²=-9/8x-9/8=81/64

e) (-1/2)⁵= -1/2.-1/2.-1/2.-1/2.-1/2= -1/32

f) (-1/2)⁶= -1/2.-1/2.-1/2.-1/2.-1/2.-1/2= 1/64

g) 7-²=(1/7)²= 1/7.1/7=1/49

h) (5/7)-²=(7/5)²=7/5.7/5=49/25

i) (2/3)-⁴=(3/2)⁴= 3/2.3/2.3/2.3/2=81/16

j) (2/5)-³=(5/2)³=5/2.5/2.5/2=125/8

k)(4/3)-¹=3/4

l) 5-³=(1/5)³=1/5.1/5.1/5=1/125