This is so hard! Three different problems! Please help

of 1 mework.aspx?homeworkld=6316165628questionid=3&flushe. The sum, S,, of the first n terms of an arithmetic sequence is IN MATHEMATICS given by Sn - 5 (a1 + an ) , in which a, is the first term and an s the nth term. The sum S,, of the first n terms of a geometric HW Score: ay ( 1 -1" ) 91.67%, 27.5 Question 29, sequence is given by S, = - of 30 points 1 -r -, in which a, is the first 5.7.124 (x Points: 0 Save term and r is the common ratio (r # 1). of 1 Use the appropriate formula shown above to find 1 + 2 +3+4 + . - - +242, the sum of the first 242 natural The sum, S,, of the first n terms of an arithmetic sequence is numbers. given by Sn - 5 (a1 + an) , in which a, is the first term and an s the nth term. The sum S,, of the first n terms of a geometric ay (1-1") $242 - sequence is given by S, 1-r in which a, is the first term and r is the common ratio (r # 1). Use the appropriate formula shown above to find - 2+ (-4) +(-6) +(-8) + . . . + (-62), the sum of the first 31 negative even integers. Ine sum, 3 , Of the first n terms of an arinmetic sequence is given by Sn - 5 (a, + an) , in which a, is the first term $31 - and an, is the nth term. The sum S,, of the first n terms of a a, (1 -1" ) geometric sequence is given by S. =1- , in which a, is the first term and r is the common ratio (r # 1). Determine whether the following sequence is arithmetic or geometric. Then use the appropriate formula to find S10, the sum of the first ten terms. 12, - 6, 0, 6,. Clear all Check answer Choose the correct answer below. Geometric Arithmetic $ 10 = PIC . COLLAGE