Answer: 4 ( 1/2) n- 1
Explanation:
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
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