Tulislah 5 suku pertama dari barisan bilangan yang rumusnya sebagai berikut : a. Un = 6n - 5 b. Un = 1/2 (3n + 9 ) c. Un = 7n + 1

[tex]a.u1 \\ = 6(1) - 5 \\ = 6 - 5 \\ = 1 \\ u2 \\ = 6(2) - 5 \\ = 12 - 5 \\ = 7 \\ u3 \\ = 6(3) - 5 \\ = 18 - 5 \\ = 13 \\ u4 \\ = 6(4) - 5 \\ = 24 - 5 \\ = 19 \\ u5 \\ = 6(5) - 5 \\ = 30 - 5 \\ = 25 \\ b.u1 \\ = \frac{1}{2} (3(1) + 9) \\ = \frac{1}{2}(3 + \\ 9) \\ = \frac{1}{2} (12) \\ = 6 \\ u2 \\ \frac{1}{2} (3(2) + 9) \\ = \frac{1}{2}(6 + 9) \\ = \frac{1}{2} (15) \\ = 7.5 \\ u3 \\ = \frac{1}{2}(3(3) + 9) \\ = \frac{1}{2} (9 + 9) \\ = \frac{1}{2} (18) \\ = 9 \\ u4 \\ = \frac{1}{2} (3(4) + 9) \\ = \frac{1}{2}( 12 + 9) \\ = \frac{1}{2} (21) \\ = 10.5 \\ u5 \\ = \frac{1}{2} (3(5) + 9) \\ = \frac{1}{2} (15 + 9) \\ = \frac{1}{2} (24) \\ = 1 \\ c.u1 \\ = 7(1) + 1 \\ = 7 + 1 \\ = 8 \\ u2 \\ = 7(2) + 1 \\ = 14 + 1 \\ = 15 \\ u3 \\ = 7(3) + 1 \\ = 21 + 1 \\ = 22 \\ u4 \\ = 7(4) + 1 \\ = 28 + 1 \\ = 29 \\ u5 \\ = 7(5) + 1 \\ = 35 + 1 \\ = 36[/tex]