已知x≠1,ab≠1,且2logb(x)=loga(x)+logc(x),求证:c²=(ac)的loga(b)方
问题描述:
已知x≠1,ab≠1,且2logb(x)=loga(x)+logc(x),求证:c²=(ac)的loga(b)方
已知x≠1,ab≠1,且2logb(x)=loga(x)+logc(x),
求证:c²=(ac)的loga(b)方
答
2logb(x)=loga(x)+logc(x)2loga(x)/loga(b)=loga(x)+loga(x)/loga(c)2loga(c)/loga(b)=1+loga(c)=loga(ac)loga(c^2)=loga(b)loga(ac)=loga{(ac)loga(b)方 }所以c²=(ac)的log...