已知函数f(x)=log5底(log5底(log5底x) ),则f(5的5次方)的值为?
问题描述:
已知函数f(x)=log5底(log5底(log5底x) ),则f(5的5次方)的值为?
答
f(5^5)=log5{log5[log5(5^5)]}=log5{log5[5]}=log5{1}=0
已知函数f(x)=log5底(log5底(log5底x) ),则f(5的5次方)的值为?
f(5^5)=log5{log5[log5(5^5)]}=log5{log5[5]}=log5{1}=0