Ask a Question
Question Asked by a Student from EXXAMM.com Team
Q 1628791601.     Consider the following statements in respect of the expression `S_n =(n(n+1))/2`
where `n` is an integer.
1. There are exactly two values of `n` for which `S_n = 861`.
2. `S_n=S_(-(n+1))`, and hence for and integer `m`, we have
two values 'of `n` for which `S_n =m`
Which of the above statement(s) is/are correct `?`
(Provided By a Student and Checked/Corrected by EXXAMM.com Team)