求极限 Lim(n趋于无穷)(n^(2/3) sinn^2)/(n-1)如题

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求极限Lim(n趋于无穷)(n^(2/3)sinn^2)/(n-1)如题求极限Lim(n趋于无穷)(n^(2/3)sinn^2)/(n-1)如题求极限Lim(n趋于无穷)(n^(2/3)sinn^2)

求极限 Lim(n趋于无穷)(n^(2/3) sinn^2)/(n-1)如题
求极限 Lim(n趋于无穷)(n^(2/3) sinn^2)/(n-1)
如题

求极限 Lim(n趋于无穷)(n^(2/3) sinn^2)/(n-1)如题
lim(n→∞) (n^(2/3) sinn²)/(n-1)
=lim(n→∞) [n^(2/3)/(n-1)]*sinn²
∵lim(n→∞) [n^(2/3)/(n-1)]=lim(n→∞) {1/[n^(1/3)-1/n^(2/3)}=0
-1≤sinn²≤1,sinn²有界
∴lim(n→∞) [n^(2/3)/(n-1)]*sinn²=0
∴lim(n→∞) (n^(2/3) sinn²)/(n-1)=0