Question

The first three terms of a sequence are given. Round to the nearest thousandth (if necessary).

20,10,5,...
Find the 9th term.

Answer 1

Answer:9th term is 0.078 approx.

Step-by-step explanation: the given sequence is decreasing by a factor of 2 each time.

so we can find 4th term :-

4th term= 5/2=2.5

similarly,we can find the term 5th,6th,7th,8th terms respectively:-

5th = 2.5/2=1.25

6th=1.25/2=0.625

7th=0.625/2=0.3125

8th=0.3125/2=0.15625

so 9th term is equal to 0.078.