Question

log (0,5) 0,5 *log (9)1/81-7^log(7)2

Answer 1

$log _{0,5} 0,5*log _{9} frac{1}{81} -7 ^{log _{7}2 } =1*log _{9} 9 ^{-2} -2=-2log _{9}9-2= -2 -2=$$-4$