12 Indicate a general rule for the nth term of this sequence. 6m, 3m, 0, -3m, -6m, . . . a n = -3mn + 9m a n = 3mn + 9m a n = 3mn – 9m a n = -3mn – 9m

K Find the nth term and the indicated term of the arithmetic sequence whose initial term, a, and common difference, d, are given. a=5; d=10 an = ?; a16 = ? A. an=5+10n; a16 = 155 OB. an=-5+10n; a16 = 155 OC. an=-5-10n; a16 = 155 OD. an=-5+10n; a16 = 75

Write the first four terms of the sequence defined by the formula. b; =- 7 -j for every integer j2 1. 7 +j b1 %3! b2 %3! b4 3.