College Algebra & Trigonometry, 2018a

534 CHAPTER 11. THE LAW OF SINES THE LAW OF COSINES
Section 6.1(cont.)
21) General Term: a n = n +5 23) General Term: a n =3n − 2
Recursive: a 1 =6,a n = a n−1 +1 Recursive: a 1 =1,a n = a n−1 +3
25) General Term: a n = −2 ∗ (−3) n−1 27) General Term: a n = −2n +3
Recursive: a 1 = −2,a n = −3 ∗ a n−1 Recursive: a 1 =1,a n = a n−1 − 2
29) General Term: a n = 5 2 n 31) General Term: a n = ( − 1 3
) n
Recursive: a 1 = 5 2 ,a n = 1 2 a n−1
Recursive: a 1 = − 1 3 ,a n = − 1 3 ∗ a n−1
33) General Term: a n =(−1)(−5) n or 5 n (−1) n+1
Recursive: a 1 =5,a n = −5a n−1
35) General Term: a n = n (−1)n+1
Recursive: a 1 =1,a n = a n−1
(
n(n − 1)
) (−1) n+1
Section 6.2
1) Arithmetic, d =4 3) Geometric, r =1.5 5) Neither
7) Arithmetic, d =20 9) Neither 11) Geometric, r =0.25
13) Neither 15) Geometric, r =2