f(n)=(1/n+1)+(1/n+2)+.+(1/n+3),则f(k+1)=最后一项是1/3n+1 .看错了- -
问题描述:
f(n)=(1/n+1)+(1/n+2)+.+(1/n+3),则f(k+1)=
最后一项是1/3n+1 .看错了- -
答
f(n)=(1/n+1)+(1/n+2)+.+(1/n+3),则f(k+1)=
最后一项是1/3n+1 .看错了- -