设数列{xn}有界,又limn->无穷yn=0,证明证明limXn．Yn=0,并由此结论求极限limn->无穷[n/(n^2+1)]sinn!
问题描述：
设数列{xn}有界,又limn->无穷yn=0,证明证明limXn．Yn=0,并由此结论求极限limn->无穷[n/(n^2+1)]sinn!
答
设数列{xn}有界,又limn->无穷yn=0,证明证明limXn．Yn=0,并由此结论求极限limn->无穷[n/(n^2+1)]sinn!