The terms of a geometric sequence have an initial term and a common ratio. The common ratio multiplies the previous term to get the next one. That sentence describes the recursive relation.

The general explicit term of a geometric sequence is ...

a[n] = a[1]×r^(n-1) . . . . . where a[1] is the first term and r is the common ratio

Comparing this to the expression you are given, you see that ...

a[1] = 1/2

r = 4/3

(You also see that parenthses are missing around the exponent expression, n-1.)

A recursive rule is defined by two things:

the starting value(s) for the recursive relation
the recursive relation relating the next term to previous terms

The definition of a geometric sequence tells you the recursive relation is:

<em>the next term is the previous one multiplied by the common ratio</em>.

In math terms, this looks like

a[n] = a[n-1]×r

Using the value of r from above, this becomes ...

a[n] = a[n-1]×(4/3)

Of course, the starting values are the same for the explicit rule and the recursive rule:

a[1] = 1/2

7 0

2 years ago

One more... and ill be out of yalls hair.

Zarrin [17]

Awnser:69
I had this question a few minutes ago, that’s funny

7 0

2 years ago