Name : Score : Teacher : Date : Arithmetic Sequences Determine whether each sequence is arithmetic. If so, find the common difference. 1) 21, 15, 9, 3 ... 2) 5.0, 10.7, 16.4, 22.1 ... 3) 7, 14, 11, 28 ... 4) 26.0, 32.9, 39.8, 46.7 ... st Find the first four terms and stated term given the arithmetic sequence, with a1 as the 1 term. 5) an = 25 - 5n, a19 6) an = 34.1 - 7.1n, a17 7) an = 32.1 - 7.5n, a13 8) an = 18 - 7n, a8 Given the first term and common difference, find the first four terms and the formula. 9) 11) a1 = 19.1, d = -6.6 10) a1 = 10.0, d = 5.0 a1 = 17, d = 5 12) a1 = 24, d = 5 Math-Aids.Com Name : Score : Teacher : Date : Arithmetic Sequences Determine whether each sequence is arithmetic. If so, find the common difference. 1) 21, 15, 9, 3 ... Common Difference : -6 3) 7, 14, 11, 28 ... Not a valid arithmetic sequence 2) 5.0, 10.7, 16.4, 22.1 ... Common Difference : +5.7 4) 26.0, 32.9, 39.8, 46.7 ... Common Difference : +6.9 st Find the first four terms and stated term given the arithmetic sequence, with a1 as the 1 term. 5) an = 25 - 5n, a19 6) an = 34.1 - 7.1n, a17 20, 15, 10, 5 ... 27, 19.9, 12.8, 5.7 ... a19 = -70 a17 = -86.6 7) an = 32.1 - 7.5n, a13 8) an = 18 - 7n, a8 24.6, 17.1, 9.6, 2.1 ... 11, 4, -3, -10 ... a13 = -65.4 a8 = -38 Given the first term and common difference, find the first four terms and the formula. 9) a1 = 19.1, d = -6.6 st 10) a1 = 10.0, d = 5.0 st 1 4 Terms: 19.1, 12.5, 5.9, -0.7 ... 1 4 Terms: 10.0, 15.0, 20.0, 25.0 ... Formula: an = 25.7 - 6.6n Formula: an = 5.0 + 5.0n 11) a1 = 17, d = 5 st 12) a1 = 24, d = 5 st 1 4 Terms: 17, 22, 27, 32 ... 1 4 Terms: 24, 29, 34, 39 ... Formula: an = 12 + 5n Formula: an = 19 + 5n Math-Aids.Com