Question

urgente porfavor plissss

Answer 1

$E=[27(\frac{3}{4})^-1 + (\frac{3}{4})^-2 +( \frac{9}{20})^-1]^ \frac{1}{2} E=[ 27 (\frac{4}{3})^1 + (\frac{4}{3})^2 + (\frac{20}{9})^1]^ \frac{1}{2} E=[(\frac{135}{3}) + (\frac{16}{9}) + (\frac{20}{9}) ] ^ \frac{1}{2} E=[49]^ \frac{1}{2}$