Need some help on these

Question

   

Answer 1

22 an = 2(3)^(n-1)

a1 = 2

a2 = 2(3) =6

a3 = 2(9) = 18

a4 = 2(27) = 54

23 an=3(2)^(n-1

24 an=200(1/5)^(n-1)

25 an=3(-4)^(n-1)

26 an = 8(-1)^(n-1)

27 an=686(1/7)^(n-1)

28 an=4(2)^(n-1)

29 an=(5)^(n-1)

30 an=100(1/2)^(n-1)

31 an=2(-4)^(n-1)

32 an=(-1/36)(-3)^(n-1)

33 an = 192(2/3)^(n-1)