证明:log(a^n)M
=log(a)M /log(a)(a^n)
=1/nlogaM
用 换底公式
logaM=logbM/logba
那这样,
令y=log(a^n)M
( a^n)^y=M
a^ny=M
ny=logaM
∴y=log(a^n)M=1/nlogaM
还不给分.
证明:log(a^n)M
=log(a)M /log(a)(a^n)
=1/nlogaM
用 换底公式
logaM=logbM/logba
那这样,
令y=log(a^n)M
( a^n)^y=M
a^ny=M
ny=logaM
∴y=log(a^n)M=1/nlogaM
还不给分.