Question

The 700th term in a geometric sequence is 20. If the common ratio of the sequence is 0.25, what is the 699th term? a. 5 b. 10c. 80

Answer 1

c

Explanation:

the nth term of a geometric sequence is r times the previous term , then

a₆₉₉ × r = a₇₀₀ , that is

a₆₉₉ × 0.25 = 20 ( divide both sides by 0.25 )

a₆₉₉ =
`(20)/(0.25)` = 80