rida ay Find the nth term of the sequence. = -73 -38 and a11 11. a6 = nommo 8 I 12. a3 = 19 and a 15 = -1.7 13. a5 = 16 and a14 = 38.5 Find the indicated nth partial sum (Sn) of the arithmetic sequence. 14. 8, 20, 32, 44, ... n = 10 An + A (n-1) d 8+(10-1)12 =116 10(8+116) = 620 2 15. a = -6, d = 4, n = 50 -6+(50-1)4 =190. 50(-6+190) =4600 s bi 2 Rights & Equa AGENDA: Rights & Equality for A 16. 100+ 105 + 110 +...+220 An+a - (n-1) d a 220=100+(n-1)5 120 = (n-1)5 an d=5 24=(n-1) 25=n 4000 2 525 = 25(100+220) 18. a = 3, d = 2, n = 12 17. 0.5+1.3 + 2.1 + ... + 70.1 An+ A + (n-1) d 70.1= 0.5+ (n-1) 0.8 69.6 = (n-110.8 87 = (n-1).8 = 88 (0.5+70.1) = 3106.4 88-n 88 2 19. a = 100, d = -5, n = 8 20. a = 8, 5 = 9.5, n = 12 21. -3++0+ + 30 ... NOTE: Link will be provided in the General Feed. Sigma help ind the sums of the following arithmetic series in summation notation. 22. 50 n = 1 n 1+2+3...50 550 = 20 (1+50) =1275 23. 100 n = 51 2n Wrong 100 S100 = 2 (1-100) =5050 top minus bottom plus I 24. 500 n = 75 n=426 (n + 6) = 81+82+...+506 426 (81+506) 2 = 125031 at them and dumn fireho gemands for th n = 2 2 17-2+1=16 - 10 n n = 5 10-5-1-6 2n=4-6-8-... 34 10 17 n 27. n = 1 - 30 (600 - n) 26. n = 11 25. 250 n = 100 uns below, ... une histor n=2 10 n=5+6+7.10 28. How many terms of the arithmetic sequence -2, 3, 8,... must be added to get 1573? 29. How many terms of the arithmetic sequence 15, 12, 9,...must be added to get -39? 30. How many terms of the arithmetic sequence -1, 2, 5,... must be added to get 609?