Nlog(a)(M)
=log(a)(M)^N
=Nlog(a)(M) N个log(a)(M)相加.
log^N(a)(M)
=[(log(a)(M)]^N
log(a)(M)*log(a)(M)*...*log(a)(M)(N个 log(a)(M)相乘)
所以Nlog(a)(M)是不等于log^N(a)(M)