A^{(1+N)*N/2}=N^2 A^{(1+N)*N}=N^4 (A^N)*(A^n*n)=N^4
lg(A^N)*(A^n*n)=lgN^4
lga^n+lga^(n^2)=4lgN
lga^n+2lga^n=4lgN
3lga^n=4lgN
lga^n=4/3lgn
lga^n=lgn^4/3
结果
a^n=n^(4/3)
即 N 的三分之四方
A^{(1+N)*N/2}=N^2 A^{(1+N)*N}=N^4 (A^N)*(A^n*n)=N^4
lg(A^N)*(A^n*n)=lgN^4
lga^n+lga^(n^2)=4lgN
lga^n+2lga^n=4lgN
3lga^n=4lgN
lga^n=4/3lgn
lga^n=lgn^4/3
结果
a^n=n^(4/3)
即 N 的三分之四方