log2(log0.5(log2a))=0
log0.5(log2a)=1
log2 a=0.5
a=平方根下2,
log3(log1/3 (log3 b))=0
log1/3 (log3 b)=1
log3 b=1/3
b=立方根下3,
∵a^6=8 ,b^6=9
∴a