Question 28
ProgressionsWhat is the nth term of the progression 27, 9, 3,...?
- A.27(1/3)n−1
- B.3n+2
- C.27 + 18(n − 1)
- D.27 + 6(n − 1)
Show the answer and explanation
Answer: A (27(1/3)n−1)
Explanation
It is a G.P. with first term 27 and common ratio ⅓, so the nth term is 27(⅓)n−1.