log3(x)=-1/log2(3)
log3(x)=-1/(lg3/lg2)
log3(x)=-lg2/lg3
log3(x)=lg2^(-1)/lg3
log3(x)=log3(2^-1)
x=1/2
所以x^-3=8
已知 log3(x)=-1/log2(3) 则x^-3=
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