已知2^(6a)=3^(3b)=6^(2c),则a,b,c之间的关系式_____
问题描述:
已知2^(6a)=3^(3b)=6^(2c),则a,b,c之间的关系式_____
答案为3ab-bc-2ac=0
求思路.
答
设2^(6a)=3^(3b)=6^(2c)=tlog(2)[t]=6alog(3)[t]=3blog(6)[t]=2c所以log(t)[2]=1/6alog(t)[3]=1/3blog(t)[6]=1/2c因为log(t)[6]=log(t)[2]+log(t)[3]所以1/2c=1/3b+1/6a公式整理得3ab=2ac+bc所以3ab-bc-2ac=0...