Question

: For each of the sequences below:
a)describe the term -to - term rule.
b)Calculate the tenth term.
i ) 3,1.5,0,-1.5.......
ii) 16,8,4,2.........
iii)10,6,2,-2..........

Answer 1

i ) a = 3

d = 1.5 - 3

d = - 1.5

ii ) a =16

r = $\frac{8}{16}$

r = $\frac{1}{2}$

iii ) a = 10

d = 6 - 10

d = -4

First and Last are Arithmetic and Middle one is Geometric Progression