如题所述
lim(n→∞)3n³分之[(n+1)(n+2)(n+3)]
lim(n→∞)3n³分之[(n+1)(n+2)(n+3)]=lim(n→∞)3分之[(1+1/n)(1+2/n)(1+3/n)]=3分之1
lim(n→∞)[(1*(1-(3^(n+1))分之1}/(1-1/3)这部不知道怎么写在纸上,麻烦再清晰点表明,我看不懂,谢谢!