Resposta:
Explicação passo a passo:
A) 7√2 = √(7² · 2) = √(49 · 2) = √98 = √98
Verdadeira
B) √(2² · 5) + √(2² · 2² · 5) = 2√5 + (2 · 2)√5 = 2√5 + 4√5 = 6√5 =
√(6² · 5) = √(36 · 5) = √180 ≠ √100
Falsa
C) √40 · √90 = √(40 · 90) = √3600 = √3600
D) √0,01 + 3√0,064 =
[tex]\sqrt{0,01}+3\sqrt{0,064}=\\\\\\\sqrt{\frac{1}{100} }+3\sqrt{\frac{64}{1000} }=\\\\\\\sqrt{\frac{1}{10^{2} } }+3\sqrt{\frac{8^{2} }{10^{2}.10 } }=\\\\\{\frac{1}{10}+3.(\frac{8}{10})\sqrt{\frac{1}{10} }= \\\\\\\frac{1}{10}+\frac{24}{10}\sqrt{\frac{1}{10} }=0,1+2,4\sqrt{0,1}=0,86[/tex]
0,86 ≠ 0,5
Copyright © 2024 ELIBRARY.TIPS - All rights reserved.
Lista de comentários
Verified answer
Resposta:
Explicação passo a passo:
A) 7√2 = √(7² · 2) = √(49 · 2) = √98 = √98
Verdadeira
B) √(2² · 5) + √(2² · 2² · 5) = 2√5 + (2 · 2)√5 = 2√5 + 4√5 = 6√5 =
√(6² · 5) = √(36 · 5) = √180 ≠ √100
Falsa
C) √40 · √90 = √(40 · 90) = √3600 = √3600
Verdadeira
D) √0,01 + 3√0,064 =
[tex]\sqrt{0,01}+3\sqrt{0,064}=\\\\\\\sqrt{\frac{1}{100} }+3\sqrt{\frac{64}{1000} }=\\\\\\\sqrt{\frac{1}{10^{2} } }+3\sqrt{\frac{8^{2} }{10^{2}.10 } }=\\\\\{\frac{1}{10}+3.(\frac{8}{10})\sqrt{\frac{1}{10} }= \\\\\\\frac{1}{10}+\frac{24}{10}\sqrt{\frac{1}{10} }=0,1+2,4\sqrt{0,1}=0,86[/tex]
0,86 ≠ 0,5
Falsa