Come si semplifica 8 ^ (- 2/3) ?
Risposta:
1/4
Spiegazione:
"using the "color(blue)"laws of exponents"
•color(white)(x)a^mhArr1/a^m
•color(white)(x)a^(m/n)hArr(root(n) a)^m
8^(-2/3)=1/8^(2/3)=1/(root(3)8)^2=1/2^2=1/4
1/4
"using the "color(blue)"laws of exponents"
•color(white)(x)a^mhArr1/a^m
•color(white)(x)a^(m/n)hArr(root(n) a)^m
8^(-2/3)=1/8^(2/3)=1/(root(3)8)^2=1/2^2=1/4