Question: Some help on this arithmetic sequence question 34. (20 points) (a) For the arithmetic series Amol. 1 + 2 +3+... +n explain how to arrive

Some help on this arithmetic sequence question

Some help on this arithmetic sequence question 34. (20 points) (a) For

34. (20 points) (a) For the arithmetic series Amol. 1 + 2 +3+... +n explain how to arrive at the formula almarot ard ovhok S =1+2+3+... +n=- _ n ( n + 1) 2 (b) Hence, find the sum S = 1+2+3+...+ 320

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