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wellingtonalexs
@wellingtonalexs
October 2020
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AJUDA AQUI GALERA URGENTE
3- Calcule:
a) (-2/3)^0 b) (-2/3)-¹ c) (-2/3)-² d) (3/5)-¹ e) (3/5)-³
f) (7/4)^0 g) (4/7)-¹ h) (7/2)-²
4- Diga se existe ou não, no conjunto IR, a raiz quadrada de:
a) 25 b) -36 c) 1 d) 64 e) 10 f) -9 g) -10 h) 12
5- Considere as expressões √9, ³√-1, ^4√16, ^5√1, √-4, ³√-125, ^4√-16, ^6√64 e responda:
a) Quais as que representam numeros reais?
b) Quais as que não são definidas no conjunto dos reais?
6- Usando a definição de raiz enésima de um número real, determine:
a) √25 b) ³√64 c) ³√27 d)-√49 e) ^5√-1 f) ^4√81 g) ^5√32 h) -³√125
i)-√81 j) √225 l) ^5√243 m) ^7√-128
7- Verifique se a expressão √b²-4ac representa um número real quando a=3, b=-5 e c=-2.
8- Determine o valor das expressões numéricas:
a) √9 - ³√-8
b) ³√125 + ³√-27 - ³√-1
c) (^5√2³-3²) : (√8²+6²)
d) 4.√25 + 2 . ³√-27
OBS: Onde está ^ significa elevado!!!! Preciso de resoluções em todas as questões.
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