· created date: 4/28/2020 5:57:00 pm
TRANSCRIPT
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1. Observe os números a seguir.
–3; −3
2;–1,5; 0,333...; 7; 51
Quais deles pertencem ao conjunto
a) dos números naturais?
b) dos números inteiros?
c) dos números racionais?
2. Analise cada uma das sentenças a seguir e diga se são verdadeiras ou
falsa:
a) 100 ∈ IR;
b) 100 ∉ IR;
c) −16 ∈ IR;
d) π ∉ IR
3. Quais dos números a seguir têm raiz quadrada definida no conjunto IR?
a) 36 c) –81 e) 10
b) –64 d) 144 f) –9
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1. Aplicando as propriedades, simplifique as operações com potências.
a) 72 ∙ 77 =
b) 53 ∙ 5 =
c) 86 : 89 =
d) 36 : 32 =
e) (25)6 =
f) (42)3 =
2. Dê o valor, na forma decimal, de:
a) 2–1 =
b) 4–2 =
c) 10–3 =
d) 5–2 =
3. Qual é o resultado da expressão310+38
10?
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4. Escreva na forma de potência, com expoente fracionário.
Exemplo: 23 = 23
2
a) 523 =
b)752 =
c)385 =
d) 3 =
5. Agora, faça o processo inverso da atividade anterior: escreva na forma de radical.
Exemplo: 25
3 =325
a) 27
4=
b) 43
7=
c) 31
2=
d) 𝑥1
7=
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livro didático e pesquisando na Internet!
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GIOVANNI JÚNIOR, José Ruy; CASTRUCCI, Benedito. A Conquista da Matemática. 9º ano,
ensino fundamental, anos finais. 4ª ed. – São Paulo, FTD, 2018.
MODERNA; Mara Regina Garcia Gay, Willian Raphael Silva. – Coleção Araribá. 9º ano, 1. ed.
– São Paulo: Moderna, 2018.
SILVEIRA, Ênio. Matemática: compreensão e prática. 9º ano, ensino fundamental, anos
finais. 5ª ed. – São Paulo, Moderna, 2018.
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