The answers are in the 3rd picture

& Download A Alter Page 1 of 3 Find the first five terms of the following arithmetic sequences. 1. a1 = -5, d = 4 2. a1 = 1, d = - - 3. a1 = 17, a7 = - 19 4. a3 = 7, a15 = 13 5. an = 2n - 17 6. a1 = -19, an = an-1 - 1.4 7. If ag = 40 and a23 = 115 in an arithmetic sequence, find a1 8. If a3 = -17.1 and a10 = -15.7 in an arithmetic sequence, find a21. O W 56OF HomePage 2 of 3 Write an explicit formula for the following arithmetic sequences. 9. {17, 25, 33, ...} 10. {1.8, 3.6, 5.4, ...} 11. {-5, 95, 195, ...} Find the sum of the following arithmetic sequences. 12. 3.2 + 3.4 + 3.6 + ...+ 5.6 13. 10 + 18 + 26 + ...+ 162 O 9 m W 56.F HomeDownload A Alt Page 3 of 3 Answers. 1. {-5, -1, 3, 7, 11}, 2. (1 , 2, - 2, -1, -53, 3. {17, 11, 5, -1, -7} 4. {6, 6.5, 7, 7.5, 8}, 5. {-15, -13, -11, -9, -7} 6. {-19, -20.4, -21.8, -23.2, -24.6} 7. a1 = 5, 8. a21 3 -13.5 9. an = 8n + 9 10. an = 1.8n, 11. an =-105 + 100n 12. 57.2 13. 1720 O O m W P 56.F Prison Home