教室里座位的行数为n,每行的座位数比行数多1,教室里座位总数是（）个.

网友回答

n（n+1）
Classroom seats in Row n, number of seats per row lines and more than 1, the classroom is the total number of seats
Classroom seats in Row n, number of seats per row lines and more than 1, the total number of classroom seats （）.
======以下答案可供参考======
供参考答案1:
2+3+4+...+n+1=(2+n+1)*n/2
供参考答案2:
（n+1）*n
供参考答案3:
n（n+1）
供参考答案4:
n（n+1）
供参考答案5:
n(n+1)
供参考答案6:
2n-1