根号下log4再根号下log3再根号下log2 512

log4(log3(log2 512)))
=log4(log3 9))
=log4 2
=1/2是根号下呀而且是根号里面的根号共有3个根号log4(√log3(√log2 512)))=log4(√log3 √9))=log4(√log3 3)=log4 1=0