Question

Watch help videoWhat is a formula for the nth term of the given sequence?4,2,1...

Answer 1

Answer: 4 ( 1/2) n- 1

Explanation:

Answer 2

In this case, we'll have to carry out several steps to find the solution.

Step 01:

Data

4,2,1...

nth term = ?

Step 02:

geometric sequence

an = a1 * r ^ (n - 1)

a1 = 4

a2 = 2

r = a2 / a1 = 2 / 4 = 1 / 2

an = a1 * r ^ (n - 1)