Question

Assinale o valor da expressão abaixo: (-1/2 ) ² . ( 3 / 2 ) – ( 2/3)³ : ( - 1/27) + √ 25/64 * 1 ponto A- 12/7 B- 13/5 C- 5 D- 9

Answer 1

Resposta:

Letra D

Explicação passo-a-passo:

$(-{1\over2})^2\times({3\over2})-({2\over3})^3\div(-{1\over27})+\sqrt{{25\over64}} =\\ \\ (+{1\over4})\times({3\over2})-({8\over27})\div(-{1\over27})+{5\over8}=\\ \\ {3\over8}-({8\over\not27})\times(-{\not27\over1})+{5\over8}=\\ \\ {3\over8}-(-{8\over1})+{5\over8}=\\ \\ {3\over8}+{8\over1}+{5\over8}=$

$mmc=8\\ \\ {3+64+5\over8}={72\over8}=9$