来自李振报的问题
数列{an}的通项公式an=1/n+1+1/n+2+1/n+3+…+1/2n(n∈N+),则an+1-an=
数列{an}的通项公式an=1/n+1+1/n+2+1/n+3+…+1/2n(n∈N+),则an+1-an=
1回答
2020-09-28 12:59
数列{an}的通项公式an=1/n+1+1/n+2+1/n+3+…+1/2n(n∈N+),则an+1-an=
数列{an}的通项公式an=1/n+1+1/n+2+1/n+3+…+1/2n(n∈N+),则an+1-an=
答案:a(n+1)-an=1/(2n+1)+1/(2n+2)-1/(n+1)因为an=1/(n+1)+1/(n+2)+1/(n+3)+…+1/2n所以求a(n+1)等于多少只要将(n+1)替代上式的n即可故:a(n+1)=1/(n+2)+1/(n+3)+1/(n+4)+…+1/(2(n+1))=1/(n+2)+1/(n+3)+1/(n+4...