Question

The common ratio of a sequence is 1/2. Two terms in the sequence are a5=1 and a8=1/8


first term in the sequence:

recursive rule that describes the sequence:

Answer 1

Answer:

First term is 16

Step-by-step explanation:

Taking common ratio 'r' and first term 'A' ,

The term formula is:

A×[r^(n-1)]

Since r = 1/2, and the fifth term = 1

1 = A×[(1/2)^(5-1)]

1 = A×[(1/2)^4]

1 = A× (1/16)

A = 16