3^x=k,x=log3(k),3x=3log3(k)4^y=k,y=log4(k),4y=4log4(k)6^z=k,z=logb(k),6z=6log6(k)于是由函数g(m)=mlogm(k),k是大于1常数,m>1显然型野g(m)是卜穗喊增函数所以6log6(k)>4log4(k)>3log3(k)也族段就是6z>4y>3x