Question

2º) Desenvolva as potências.

a) [(+5) · (–2)]5 =

b) [(–3) · (–6)]7 =

c) [(–2)3

· (+3)4

]

2 =

d) [(+4) · (–5)3

]

3 =

e) [(–2a3

)]

2 =

f) [5x2

y]5 =

3º) Resolva as expressões.

a) (–3)4 = h) (–15)2 =

b) (–3)3 = i) (+16)2 =

c) (+3)2

· (+3) = j) (–13)2 =

d) (–8)4 ÷ (–8)2 = k) (–2)4

· (–2)2 =

e) (+2)6 ÷ (+2)3 = l) (3a2

)

3 =

f) [(–2)2

]

2 = m) (2a7

b)3 =

g) [(2)2

· 3]2 =​

Answer 1

Olá!!  :)

SEGUNDA QUESTÃO:

$\sf ITEM \ (A): \ \ \ \ \ \ \ \ \ \ \left[(+5) \ . \ (-2)\right] ^{2} \ \ \ = \ \ \ (-10)^{5} \\\\\\\\ ITEM \ (B): \ \ \ \ \ \ \ \ \ \ \left[(-3) \ . \ (-6)\right] ^{7} \ \ \ = \ \ \ 18^{7} \\\\\\\\ ITEM \ (C): \ \ \ \ \ \ \ \ \ \ \left[(-2)^{3} \ . \ (+3)^{4}\right]^{2} \ \ \ = \ \ \ \left[(-8) + 81\right]^{2} \ \ \ = \ \ \ 73^{2} \\\\\\\\ ITEM \ (D): \ \ \ \ \ \ \ \ \ \ \left[(+4) \ . \ (-5)^{3}\rith] ^{3} \ \ \ = \ \ \ (+4) \ . \ (-5)^{6}$

$\sf ITEM \ (E): \ \ \ \ \ \ \ \ \ \ \left[(-2a)^{3}\right]^{2} \ \ \ = \ \ \ (-2a)^{6}$

TERCEIRA QUESTÃO:

$\sf ITEM \ (A): \ \ \ \ \ (-3)^{4} \ = \ 81 \\\\ ITEM \ (B): \ \ \ \ \ (-3)^{3} \ = \ -27 \\\\ ITEM \ (C): \ \ \ \ \ (+3)^{2} \ = \ 9 \\\\ ITEM \ (D): \ \ \ \ \ (-8)^{4} \ : \ (-8)^{2} \ \ \ = \ \ \ (-8)^{2} \ \ \ = \ \ \ 64 \\\\ ITEM \ (E): \ \ \ \ \ (+2)^{6} \ : \ (+2)^{3} \ \ \ = \ \ \ \ \ 2^{3} \ \ \ \ \ \ = \ \ \ 8 \\\\ ITEM \ (F): \ \ \ \ \ \ \ \ \ \ \left[(-2)^{2}\right] ^{2} \ \ \ \ \ \ = \ \ \ \ (-2)^{4} \ \ \ = \ \ 16$

$\sf ITEM \ (G): \ \ \ \ \ \ \ \ \ \left[(2^{2}) \ . \ 3\right] \ \ \ \ \ \ = \ \ 4 \ . \ 3 \ \ \ \ \ \ = \ \ \ 12 \\\\ ITEM \ (F): \ \ \ \ \ \ \ \ \ (-15)^{2} \ \ = \ \ 225 \\\\ ITEM \ (i): \ \ \ \ \ \ \ \ \ \ (+16)^{2} \ \ = \ \ 256 \\\\ ITEM \ (J): \ \ \ \ \ \ \ \ \ (-13)^{2} \ \ = \ \ 169 \\\\ ITEM \ (K): \ \ \ \ \ \ \ \ \ (-2)^{4} \ \ \ = \ \ 16 \\\\ ITEM \ (L): \ \ \ \ \ \ \ \ \ (3a^{2})^{3} \ \ \ = \ \ 3a^{6}$

$\sf ITEM \ (M): \ \ \ \ \ \ \ \ (2a7b)^{3} \ \ = \ \ ????$       ⇒   desculpe, não entendi.

Espero ter ajudado, bons estudos!!  :)