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问题: 数学对数函数

设log16(27)=a,用a表示log6(16)=______

解答:

log(16)(27)=ln(27)/ln(16)=3ln3/4ln2=a
ln3=4a/3*ln2


log(6)(16)
=ln16/ln6
=4ln2/(ln2+ln3)
=4ln2/(ln2+4a/3*ln2)
=12/(4a+3)