Question

(UFV- MG) Dada a expressão
E=$[(- \frac{1}{2} )^{4}$÷$(- \frac{1}{2} )^{3}]$×$(- \frac{1}{2} )^{6}$+$2^{-7}$+$( \frac{1}{3} )^{-3}$,é correto afirmar que o valor de 2E-26 é igual a?
resposta:  28

Answer 1

$[(- \frac{1}{2} )^4:( -\frac{1}{2} )^3]*(- \frac{1}{2})^6+2^{-7}+( \frac{1}{3} )^{-3} \\ \\ \frac{1}{16}: (-\frac{1}{8})]* \frac{1}{64}+ (\frac{1}{2})^{7} +3^3 \\ \\ \frac{1}{16}. (-8)]*\frac{1}{64}+ \frac{1}{128}+27 \\ \\ -\frac{1}{2}* \frac{1}{64}+\frac{1}{128}+27 \\ \\ -\frac{1}{128}+\frac{1}{128}+27 \\ \\ 27 \\ \\ \\ \\ 2E-26= \\ 2*27-26= \\ 54-26=28$