当a,b,c满足何种关系时,2^6a = 3^3b =6^2c

问题描述:

当a,b,c满足何种关系时,2^6a = 3^3b =6^2c

满足:3ab-2ac=bc设2^6a=3^3b=6^2c=k则6a=log(2,k)=1/log(k,2).3b=log(3,k)=1/log(k,3)2c=log(6,k)=1/log(k,6)=1/[log(k,2)+log(k,3)]=1/[1/6a+1/3b]即1/2c=1/6a+1/3b得3ab-2ac-bc=0解此题的关键在于设 ,然后进行指...问个问题,1/2c=1/6a+1/3b这条式子我首先化成"3ab=bc+2ac"最后是化成"bc+2ac-3ab=0",还请解释一下符号的问题bc+2ac-3ab=0与3ab-2ac-bc=0是没有任何区别的啊,呵呵。你两边都乘以-1,不就一样了吗?等式两边都乘以相同的数,结果不变。