Tubemary02 Tubemary02

09-03-2018
Mathematics

contestada

Calcule as potências a seguir:

A) -(1,2)²
B) -5²
C) (-5)²
D) -(0,3) °
E) (-⅔)³
F) (1⅔)²
G) -2/5)³

Respuesta :

mdotfoes mdotfoes

09-03-2018

(2/3)³=2*2*2/3*3*3= 8/27(3/5)^-2= (5/3)^2= 5*5/3*3=25/9(-2)^5= -32-2^5=-32
Essa questão do parenteses só muda quando o expoente for par, ai se estiver em parêntese, o valor(+/-) muda:(-3)^2=+6-3^2=-6

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